QNAP TS-251+
2-bay High-performance Intel quad-core NAS supporting virtualization, transcoding, and HDMI for home and SOHO users

Features:

Quad-core 64-bit Intel® Celeron® CPU for exceptional performance

The TS-251+ is powered by a 64-bit Intel® Celeron® quad-core 2.0GHz processor and has 2GB/8GB energy-efficient DDR3L RAM (upgradable to 8GB) an dual gigabit LAN ports, delivering up to 225 MB/s read & write speeds with port trunking mode. The TS-251+ can also automatically increase the processor's clock rate from 2.0GHz to 2.42GHz when needed for CPU-intensive tasks. The TS-251+ supports AES 256-bit volume & folder encryption with transfer speeds of up to 205 MB/s, boosting system performance & security while ensuring the safety of sensitive personal data stored in the TS-251+.

Tested in QNAP Lab. Figures could vary by environment.
Test environment: NAS: OS: QTS 4.2.0 Volume type: RAID 5; 4 x Seagate 1TB HDD (ST1000NM0033) Network environment: direct connection between NAS and PC, 1GbE LAN (MTU 1500)
Client PCs: Intel® Core™ i7-4790 3.60GHz CPU; DDR3-1600 16GB; Seagate 500GB ST500DM002; Intel Gigabit CT (MTU 1500);Windows® 7Professional 64bit SP1 IOMeter configuration: Transferring 8GB file continuously to/from 4 PCs for 3 minutes. Block size: 64KB for SMB2.0 (Throughput)

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Use your TS-251+ as a PC with QvPC Technology

QNAP's exclusive QvPC Technology consolidates a number of high-end technologies including VM integration, multimedia transcoding, HDMI output, cloud integration and NAS connection technologies, allowing users to operate the TS-251+ as a PC when they plug in a keyboard, mouse and HDMI monitor. With QvPC Technology, the TS-251+ is transformed into a cost-effective device with PC functionalities for users to directly access stored data, run multiple applications using Windows®/Linux®/UNIX®/Android™ based VMs, surf the web, enjoy Full HD videos with Kodi™, monitor surveillance live feeds from IP cameras in real time, and much more.

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Enjoy videos on TV via HDMI with bundled remote control

QNAP HD Station integrates the powerful Kodi™ media player and web browser. With HDMI connectivity, you can connect the TS-251+ to a HDTV to watch your rich multimedia content on the big screen. The splendid user interface and support for 7.1-channel audio passthrough* bring smooth playback of 1080p videos**. You can even watch YouTube™ videos, surf the web and manage the TS-251+ using Google Chrome™ or Mozilla Firefox® with multilingual keyboard input. HD Station supports multi-tasking and user authentication so only authorised users can access the stored data via HDMI monitors.

The TS-251+ is packed with the QNAP RM-IR002 remote control for you to conveniently control HD Station via the built-in IR receiver. You can also turn your mobile devices into remote controls by installing the Qremote app. HD Station also supports YouTube Pairing, allowing you to select a YouTube™ video on your smartphone, tablet or computer and play it on your HDTV via the TS-251+.

*A receiver with HDMI support is required for decoding multi-channel surround sound. ** The quality of video and music delivery may vary depending on hardware and network environments.

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Real-time & offline HD video transcoding

The TS-251+ delivers superior real-time Full HD video transcoding to convert your videos to formats that can be smoothly played on PCs, mobile devices and Smart TVs. It allows for multiple devices to simultaneously view different videos stored on the TS-251+ with on-the-fly hardware accelerated transcoding, saving your time in converting videos to different formats for different devices.

With the benefits of offline transcoding, if you can only connect to an Internet connection with limited/restricted bandwidth, you can still enjoy smooth videos via File Station, Video Station, or the Qfile app by selecting a pre-rendered lower-resolution video, saving system resources of the TS-251+ for other applications. The TS-251+ also allows you to set a dedicated folder for automatic video transcoding.

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Enjoy media freely with multi-zone multimedia control

Use your TS-251+ as a multi-zone multimedia system to fill every corner of your house with your choice of media. You can centrally manage and stream photos, music and videos from the TS-251+ to different rooms from a single device using Bluetooth® & USB devices connected to the TS-251+ (for music streaming only), HDMI, DLNA®, Apple TV® and Chromecast™*. Every room member in different zones can enjoy the convenience and simplicity for media playback and multimedia storage.

Alternatively, to enjoy multimedia yourself, you can choose DLNA-compatible devices, use the Qfile app on an iOS® device to browse videos/photos and play on the TV via Apple TV®, install the Media Streaming add-on app from the QTS App Center to stream media content directly on a TV via Apple TV® or Chromecast™, or transform the TS-251+ into a powerful streaming machine with DLNA®, Roku®, Amazon® Fire TV, and Google TV™ support with the support of Plex Media Server.

*To stream multimedia via Chromecast, you must first install the multimedia extension pack from the QTS App Center.

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Your Ultimate Multimedia Hub

It's never been this easy to stream your multimedia content on your HDTV. Use DLNA-compatible devices such as HDTVs, Smart TVs, Sony® PS3, Sony® PS4, Microsoft® Xbox 360 and Hi-Fi systems to enjoy HD quality videos and high-resolution audio content such as DSD (Direct Stream Digital) audio format stored on the TS-251+. You can also use the NAS as your Plex Media Server, which organizes all of your media and allows you to access all your movies and media on your mobile phones and tables. The TS-251+ is a powerful streaming machine that can be accessed through DLNA, Roku (Qmedia app), Apple TV, Amazon Fire TV, and Google TV.

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QTS 4.2 - Simple and efficient

Thanks to the intuitive user interface of QTS 4.2, your NAS experience is smarter, smoother and spectacular. Its modern flat design streamlines loading times, and the intelligent desktop allows you to quickly find desired functions, create desktop shortcuts or group shortcuts, monitor important system information on a real-time basis, and open multiple application windows to run multiple tasks concurrently, bringing greater operating efficiency. QTS breaks the barriers of devices, platforms and geography to bring optimized cloud experiences to you, and incorporates more advanced features including volume/LUN snapshot, remote connection to public cloud services in File Station, multi-zone multimedia system, and more.

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Qsirch - A smarter, faster way to search

Quickly and easily find documents, photos, videos, and music with Qsirch, QNAP's new built-in NAS search application lets you find what you need by real-time, natural search. Simply type in as much as you know about what you are trying to find, including parts of the file name or even words/phrases in the document, and Qsirch will display a list of matches, complete with thumbnails, as you type. Qsirch even remembers your search history so you can quickly navigate to files you've previously searched for. Qsirch is a huge productivity boost that greatly reduces the amount of time spent looking for files on the NAS so you can focus on other tasks.

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Run additional operating systems on the TS-251+

The Virtualization Station transforms the TS-251+ into a 2-in-a-box NAS that can function as an all-in-one NAS and a virtualization platform that supports multiple operating systems, fast VM creation, VM backup & restoration, VM import/export, snapshot, Device Management for centrally managing VM, and enables desktop operations on web browsers. With the easy-to-use interface, you can centrally manage all of the VMs created on the TS-251+ with minimal effort. You can also download VMs on demand from online VM markets and import them to the TS-251+ without any complex procedures.

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File Station integrated with cloud services

The web-based File Station enables you to easily upload, download, and manage files on your TS-251+ wherever there is an internet connection. Supporting file extraction, folder creation, and smart search for files and folders, the File Station also allows you to easily share files with friends & family via unique URLs, email, and a shared space. What's even better, you can also directly browse and transfer files between the TS-251+ and public cloud services like Google Drive™, Dropbox®, Microsoft® OneDrive, Box®, Yandex® Disk and Amazon® Cloud Drive through File Station, and view files with Office Online and Google Docs™ or directly open them with a Google Chrome™ office extension.

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Disaster recovery solutions bring peace of mind

The TS-251+ offers various data recovery options. RTRR (Real-Time Remote Replication) supports real time and scheduled data backup to remote QNAP NAS or FTP servers and synchronizes files to remote folders from local folders with better backup efficiency. You can enjoy backup versioning to preserve a certain amount of versions, with options of simple versioning to schedule how many versions should be retained and for how long, or smart versioning with a rotation scheme that automatically replaces earlier backup versions. The TS-251+ also supports rsync protocol to back up data to remote servers on a scheduled basis. Data can also be backed up to and restored from a range of cloud storage services, including Amazon® S3, Amazon® Glacier, Microsoft® Azure, ElephantDrive®, Dropbox®, Google Drive™, Google Cloud Storage™, and more.

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Volume & LUN snapshot simplifies restoration

Not limited to high-end models, the TS-251+ brings the highly-anticipated snapshot function for your flexible usage. QTS Storage Manager adds an easy-to-use web-based snapshot tool for you to easily back up and restore data on the TS-251+ back to any point of time to prevent loss of important data. You can take up to 256 snapshots for both volumes and LUN, efficiently replicate volume/LUN snapshots to remote servers by copying only the changes made, and quickly clone a volume /LUN snapshot as a local volume without interrupting the current system operation. You can even set up the system to automatically take a snapshot of the volume before backup via RTRR/rsync, even when the file is opened.

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Comprehensive security options

In open network environments, data on the connected devices may be exposed in a potential hack. The TS-251+ provides numerous security options, such as 2-step verification, encrypted access, IP blocking, and more. Administrators can also control the access rights of each user to different folders, preventing unauthorised access to important files. The TS-251+ is validated with military-level FIPS 140-2 AES 256-bit encryption, preventing sensitive data from unauthorised access and breach even if the hard drives or the entire system were stolen.

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File synchronization across multiple devices

With Qsync, your TS-251+ is turned into a safe data center for file synchronization. Any file uploaded to the TS-251+ will be made available for all linked devices, such as computers, laptops and mobile devices. Qsync is especially useful for frequent travelers in managing files and ensuring that different devices have the most up-to-date files. Qsync provides multiple ways for file synchronization and group file sharing, greatly enhancing the flexibility of team projects and collaboration. The centralized configuration allows you to remotely erase the Qsync folder on a lost device to avoid data breaches, and even restore it after you have retrieved the device.

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Comprehensive surveillance solution providing 24/7 security

The TS-251+'s Surveillance Station offers a professional surveillance solution with a user-friendly management interface, a wide range of over 3,000 compatible IP camera models, and expandable IP camera channel licenses. It supports real-time monitoring, video & audio recording and playback with a wide range of customizable settings. You can also install the Vmobile app on your iOS® or Android™ devices to manage the monitoring of cameras anytime, anywhere, to safeguard your office environment, or install the Vcam mobile app to turn your device into a network camera to instantly record to your TS-251+. The TS-251+ offers 2 free IP camera channels and you can expand up to 40 channels by purchasing additional licenses.

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Install-on-demand apps to extend NAS functionality

The TS-251+ has a built-in App Center that provides various install-on-demand apps developed by QNAP and third-party developers, including tools for backup/sync, business, content management, communications, download, entertainment, and much more. It is also a centralized location for managing & updating installed apps. In addition, QNAP's development platform embraces the open-source spirit to enable developers to create their own apps, adding potentially limitless potential for the TS-251+.

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LED indicators with adjustable brightness controls

With adjustable 3-stage brightness controls for LED indicators, the TS-251+ provides flexible LED brightness options. Based on the surrounding environment, you can adjust the brightness of all system indicators and also schedule the system to automatically dim the LEDs at certain times when needed.

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Expand storage capacity easily

The TS-251+ supports online capacity expansion for archiving rapidly growing data by connecting a QNAP expansion enclosure. With the QNAP scale-up solution, the raw storage capacity can be expanded on demand, making the TS-251+ an ideal file center with large storage capacity for personal video collections.

With the support of QJBOD Express (JBOD enclosures roaming)*, you can just connect a large capacity QNAP expansion enclosure to the TS-251+, and migrate data to another NAS through the JBOD enclosure without network connectivity.

The maximum raw storage capacity available by connecting a QNAP expansion enclosure:

NAS Model	RAID Expansion Enclosure	No. of RAID Expansion Enclosure	Total HDD No. (NAS + Enclosure)	Max. Raw Capacity (TB)**
TS-251+	UX-800P	1	10	80
	UX-500P	1	7	56

*RAID groups of storage pools cannot cross multiple enclosures. **The maximum capacity is calculated by using 8TB HDDs.

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Energy-saving & eco-friendly

The TS-251+ utilizes a 22nm CPU and DDR3L RAM which feature low voltage, low power consumption, maintaining high performance in system operations with the benefit of energy-saving. Other eco-friendly designs include S3 sleep mode, HDD standby, scheduled power on/off, hard disk standby mode, and Wake on LAN. QNAP also packs the TS-251+ in an eco-friendly box to minimize the environmental impact.

Power Consumption

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Easy-to-use NAS management tools

The TS-251+ provides comprehensive system tools to increase management efficiency.

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Additional features

The TS-251+ supports various applications for home offices as an all-in-one Turbo NAS with cost-efficiency.

Specifications:

CPU	Quad-Core Intel® Celeron® 2.0GHz (burst up to 2.42GHz)
Floating Point Unit	V
GPU	Intel® HD Graphics
Hardware-Acclerated Transcoding	V
Memory	System memory: TS-251+-2G: 2GB DDR3L RAM (1 x 2GB) TS-251+-8G: 8GB DDR3L RAM (2 x 4GB) Total memory slots: 2 SODIMM Expandable up to: 8 GB NOTE: When installing two memory modules, please ensure that they are the same size and ideally use the same type of RAM for both memory slots. For the information of RAM module installation and compatible NAS models, please refer to the QNAP RAM
Flash Memory	512MB
Drive	2 x 2.5" or 3.5" SATA 6Gb/s, 3Gb/s HDD or SSD; hot swappable trays
Expansion Unit	Max. 1 (UX-800P, UX-500P)
Gigabit LAN Ports	2
USB	2 x USB 3.0 (Front: 1, Rear: 1) 2 x USB 2.0 (Rear)
IR Receiver	Yes (QNAP RM-IR002 remote control)
HDMI	1
LED Indicators	Power/Status, LAN, USB, HDD1-2
Buttons	Power, Reset, USB Auto Copy
Alarm Buzzer	System warning
Form Factor	Tower
Dimensions (HxWxD)	168.5 x 102 x 225 mm 6.63 x 4.02 x 8.86 inch
Weight (Net / Gross)	1.28 kg (2.82 lbs) / 2.32 kg (5.11 lbs)
System Fan	1 x 7cm, 12V DC
Kensington Security Slot	1
Power Supply	External Power Adapter, 60W, 100-240V
Power Consumption (W)	S3 sleep: 0.57 HDD standby: 10.56 In operation (typical): 18.09
Sound Level*	Sound pressure (LpAm) :15.4 dB(A)
Temperature	0 - 40 °C
Humidity	5~95% RH non-condensing, wet bulb: 27˚C

* Testing Environment:
Refer to ISO 7779 ; Maximum HDD loaded ; Bystander Position ; Average data from 1 meter in front of operating NAS

Software Specifications:

Operating System	File System
QTS 4.2 (embedded Linux)	Internal Hard Drive: EXT4 External Hard Drive: EXT3, EXT4, NTFS, FAT32, HFS+
Supported Client OS	Power Management
Windows 7 (32/64-bit), Windows 8 (32/64-bit), Windows Server 2003/2008 R2/2012/2012 R2 Apple Mac OS X Linux & UNIX	Wake on LAN Internal hard drive standby mode Scheduled power on/off Automatic power on after power recovery USB and network UPS support with SNMP management System sleep mode (S3)
Supported Browsers	Access Right Management
Microsoft Internet Explorer 10+ Mozilla Firefox 8+ Apple Safari 4+ Google Chrome	Batch users creation Import/Export users User quota management Local user access control for CIFS, AFP, FTP, and WebDAV Application access control for Photo Station, Music Station, Video Station, and File Station Subfolder permissions support for CIFS/SMB, AFP, FTP, and File Station
Multilingual Support	Domain Authentication Integration
Chinese (Traditional & Simplified), Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese (Brazil), Romanian, Russian, Spanish, Swedish, Thai, Turkish	Microsoft Active Directory (AD) & Domain Controller support LDAP server, LDAP client Domain users login via CIFS/SMB, AFP, FTP, and File Station
Storage Management	myQNAPcloud Service
QNAP flexible Volume/LUN with thin provisioning and space reclaim Disk volume types: RAID 0,1, 5, 5 + hot spare, 6, 10, JBOD, Single Supports storage pools* Supports snapshots (4GB System RAM required) Supports Volume/LUN snapshot (Max 256 snapshots) Snapshot manager Snapshot clone Snapshot vault Snapshot replica Snapshot agent for Windows VSS and VMware Online volume expansion Online storage pool expansion Online RAID capacity expansion and online RAID level migration SMART data migration Storage expansion via a QNAP UX-500P/UX-800P expansion unit JBOD enclosure roaming SSD read-only/read-write cache Bad block scan and hard drive S.M.A.R.T. Bad block recovery RAID recovery Bitmap support	Private cloud storage and sharing Free host name registration (DDNS) Supports myQNAPcloud SSL certificates (DDNS) Auto router configuration (via UPnP) Web-based file manager with HTTPS 2048-bit encryption CloudLink for remote access without any complicated router setup myQNAPcloud connect for easy VPN connection (Windows VPN utility)
Networking	Qsync
TCP/IP (IPv4 & IPv6: Dual Stack) Dual Gigabit NICs with jumbo frame (failover, multi-IP settings, port trunking/NIC teaming) Service binding based on network interfaces Proxy server (Squid Proxy Server via App Center) Proxy client DHCP client, DHCP server Protocols: CIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, and SMSC UPnP & Bonjour Discovery USB Wi-Fi Adapter Support * Not all services supports IPv6.	Syncs files across multiple devices with SSL support Selective synchronization for only syncing specific folders Use team folders as a file center for greater team collaboration (maximum sync tasks:32) Shares files by links via e-mail Policy settings for conflicting files and file type filter support Version control: up to 64 versions Incremental synchronization for HDD space saving Unified privilege management Unified configuration management Supports central configuration mode Supports remote erase / restore Supports shared folders sync Supports Windows & Mac OS
Security	Web Administration
Network access protection with auto-blocking: SSH, Telnet, HTTP(S), FTP, CIFS/SMB, AFP CIFS host access control for shared folders FIPS 140-2 validated AES 256-bit volume-based and shared folder data encryption* AES 256-bit external drive encryption* Importable SSL certificates Instant alert via E-mail, SMS, beep, and push notification service 2-step verification * The data encryption functions may be unavailablenot available in accordance with the legislative restrictions of some countries.	Movable Icons and personalized desktop Smart toolbar and dashboard for neat system status display Smart fan Control Dynamic DNS (DDNS) SNMP (v2 & v3) Resource monitor Network recycle bin for file deletion via CIFS/SMB, AFP, and File Station Automatic Cleanup File Type Filter Comprehensive logs (events & connection) Syslog client/server System settings backup and restore Restore to factory default Mobile app: Qmanager for remote system monitoring & management
Powerful All-in-one server
File Server	Download Station
File sharing across Windows, Mac, and Linux/UNIX Windows ACL Advanced folder permissions for CIFS/SMB, AFP, FTP Shared folder aggregation (CIFS/SMB)	PC-less BT, FTP/FTPS, and HTTP/HTTPS, Thunder, FlashGet and qqdl download (up to 500 Tasks) BT download with Magnet Link and PT support Scheduled download and bandwidth control RSS subscription and download (broadcatching) BT search Proxy support for BT download
FTP Server	Notes Station
FTP over SSL/TLS (Explicit) FXP support Passive ftp port range control	A handy note-taking tool for everywhere you go via your private cloud Direct and quick backup from Evernote with re-editing availability Supports Google Calendar Import/Export PDF file RSS live feed and auto update Online quick preview of multimedia attachments Notes encrypt/decrypt Smart snapshot for version control Collaborate on notes with multiple users Provides Chrome Extension: Notes Station Clipper (Clip web page content to your notes)
File Station	HD (HybridDesk) Station 3.0
Supports mounting a Cloud Drive (such as Google Drive, Dropbox, Microsoft OneDrive, Amazon Cloud Drive, Yandex Disk and Box) Supports mounting remote shared folders through FTP, WebDAV or Microsoft networking (SMB/CIFS) Supports opening documents via Office Online, Google Docs or Chrome Extension (Edit Office files in Google Docs, Sheets, and Slides) Supports ISO Mounting (Up to 256 ISO Files) Supports thumbnail display of multimedia files Supports sharing download links and upload links Supports sharing to other NAS users Drag-n-drop Files via Chrome and Firefox Browsers Photo, music, and video preview and playback with hardware-accelerated transcoding File Compression (ZIP or 7z) Creation of and sending download links for sharing public files with expiration date and password protection Supports displaying subtitles (*.SRT, UTF-8 format) Video seeking support for video playback during on-the-fly transcoding Supports slideshow playback in media viewer Mobile App: Qfile for file browsing and management	Playback videos, music, photos on TV with KODI via HDMI Watch various online content such as YouTube, Flickr, Picasa, Shoutcast, etc. Web browsers (Chrome, Firefox) Supports multi-lingual keyboard, input and mouse Supports QNAP Qremote app and the official KODI remote app Supports user login permissions A variety of applications are available including Skype, Plex, and more Note: - The playback and quality of some video files may be affected by the system's CPU and GPU decoding abilities. - Up to 7.1 channel audio passthrough is supported
Transcode Management	Virtualization Station
Transcode video files to 240p, 360p, 480p, 720p and 1080p resolution Automatic video transcoding for watched folders Hardware accelerated transcoding support Embed subtitles into videos for background transcoding	Supports Virtual Machine (VM) creation to run operating systems such as Windows, Linux, Unix and Android Supports VM import and export Supports VM cloning Supports VM snapshots Supports VM backup and restore Support three different networking modes: Isolated, External-only and Bridged VM console can be displayed via HDMI output - QVM HTML5-based shared remote console
Backup Station	Signage Station
Remote replication server (over rsync) Real-time remote replication (RTRR) to another QNAP NAS or FTP server Works as both RTRR server & client with bandwidth control Real-time & scheduled backup Backup versioning for RTRR Snapshot support for RTRR/Rsync Encryption, compression, file filter, and transfer rate limitation Encrypted replication between QNAP NAS servers Desktop backup with QNAP NetBak Replicator for Windows Apple Time Machine backup support Data backup to multiple external storage devices Third party backup software support: Veeam backup & replication, Acronis True Image, Arcserve backup, emc retrospect, Symantec Backup Exec, etc.	Supports dynamic content including videos, images, music, and text Supports multi-user collaboration Supports searching using keywords Supports sharing by email and social network Supports design software: iArtist Lite Supports account authority management Supports playback on various browsers (Chrome, Firefox, IE, Safari) Supports most viewed, latest released and different categories content list
Print Server	Storage Plug & Connect
Max number of printers: 3 Supports Internet Printing Protocol Print job display and management IP-based and domain name-based privilege control	Creating and mapping shared folders by QNAP Windows Qfinder Pro Creation of and connection to iSCSI target/LUN
Photo Station	iSCSI (IP SAN)
Show photos by thumbnails, list, timeline, or folder view Supports virtual/smart albums Validity control for sharing albums Tag photos with text, colors, and ratings Slideshows with background music and different transition effects Animated thumbnails for videos Geotag photos and display them on Google maps Advanced search by tags, metadata, etc Supports uploading photos/videos to Picasa, Flickr, Weibo, YouTube Supports face detection (with the Photo Station Extension) Supports PDF to image conversion (with the Photo Station Extension) Share slideshows links to social websites or by email Supports Facebook friends login Backup/Restore album configuration	iSCSI target with multi-LUNs per target (Up to 256 targets/LUNs combined) Supports LUN mapping & masking Online LUN capacity expansion iSCSI LUN backup, one-time snapshot, and restoration iSCSI connection and management by QNAP Windows Qfinder Pro Virtual disk drive (via iSCSI initiator) Stack chaining master Max No. of virtual disk drives: 8
Music Station	Surveillance Station
Play or share music via web browser* Automatic classification via Media Library Supports streaming music to multiple devices Supports changing album covers via Google search or uploading photos Internet radio (MP3) Up to 8 music alarms Mobile app: Qmusic for music streaming and management * DRM-protected content is not supported.	Supports over 3,000 IP cameras Includes 2 free camera licenses, up to 40 camera channels via additional license purchase Instant playback to check recent events Online editing to edit cameras during live view Visual aid by e-map Playback and speed control using the shuttle bar Video preview on playback timeline Intelligent video analytics (IVA) for advanced video searching Surveillance client for Mac Mobile surveillance app: Vmobile (iOS and Android) Mobile recording app: Vcam (iOS and Android)
iTunes Server	VPN Server
Audio and video sharing for Windows & Mac iTunes	Secure remote access: PPTP、L2TP/IPsec & OpenVPN VPN services Max number of clients: 30
Video Station	VPN Client
Show photos by thumbnails, list, timeline, or folder view Supports virtual/smart collections Validity control for sharing collections Tag videos with text, color, and ratings Animated thumbnails for videos Share video links to social websites or through email Sort videos automatically into defined classifications Display movie information from IMDB Display movie posters from IMDB or user upload Supports displaying subtitles (*.SRT,*.ASS, *.SSA) Supports searching for subtitles online Supports importing subtitles Supports Facebook friends login Supports custom video classification Supports multi-zone video display Video seeking support for video playback during on-the-fly transcoding Mobile app: Qvideo for online video browsing and management	Supported VPN protocols: PPTP & OpenVPN services PPTP Authentication: PAP, CHAP, MS-CHAP, MS-CHAPv2 PPTP Encryption: None, AES 40/128 bit, AES 256 bit OpenVPN Encryption: None, AES 40/128 bit, AES 256 bit Transmission package monitor OpenVPN port control OpenVPN link compression
Cloud Backup Station	DLNA Server
Amazon S3 Amazon Glacier WebDAV-based cloud storage Microsoft Azure OpenStack	Supports DLNA/UPnP TVs and players such as PlayStation 3/4 and Xbox 360/One Supported audio formats: AIFF, APE, DSD (DSF, DFF), FLAC, M4A, M4A Apple Lossless (ALAC), MP3, Ogg Vorbis, WAV (PCM, LPCM), WMA, WMA PRO, WMA VBR* Support CUE indexing file for APE, FLAC audio format. Video and Audio On-the-fly Transcoding * DRM-protected content is not supported.
AirPlay & Chromecast	Q'center (NAS CMS)
Streams videos, photos and music from the NAS to Apple TV via Qfile or Media Streaming add-on. Streams videos, photos and music from the NAS to TV with a Chromecast dongle via Qfile , Qvideo or Media Streaming add-on.	Multiple NAS monitoring Utilization history reports Unified configuration management Visual display reports Monitor NAS behind NAT router with Q'center Assistant Virtual appliances supported for Hyper-V and VMware
App Center
Over 100 official and community software add-ons
Designs and specifications are subject to change without notice.

Optional Accessories:

Category	Order No.	Description
Expansion units	UX-500P	QNAP 5-bay Expansion unit 185.2 (H) x 210.6 (W) x 235.4 (D) mm 7.29 (H) x 8.29 (W) x 9.27 (D) inch, 5.1 kg / 11.24 lbs
	UX-800P	QNAP 8-bay Expansion unit 185.2 (H) x 298.2 (W) x 235.4 (D) mm 7.29 (H) x 11.74 (W) x 9.27 (D) inch, 7.3 kg / 16.08 lbs
RAM	RAM-2GDR3L-SO-1600	2GB DDR3 RAM, 1600 MHz, SO-DIMM
	RAM-4GDR3L-SO-1600	4GB DDR3 RAM, 1600 MHz, SO-DIMM
	RAM-8GDR3L-SO-1600	8GB DDR3 RAM, 1600 MHz, SO-DIMM
Remote control	RM-IR002	QNAP IR-002 remote conyrol (included)

Utilities:

Various handy utilities are available for you to work smartly with your Turbo NAS. These utilities help increase your productivity and make it absolutely easy with connecting the Turbo NAS, setting up the system, data backup and synchronization, downloading files, and so on.

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Qfinder Pro

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myQNAPcloud Connect

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Qsync

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Sync in multiple ways

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QNAP NetBak Replicator

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vSphere (Web) Client plug-in

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Q'center Virtual Appliance

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QNAP Snapshot Agent

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Qsnap

Product Views:

Front View	Left View	Left Angle View	Right View
Right Angle View	Drive Pull-out View	Right Side View	Left Side View
Rear View

Documentation:

Download the QNAP TS-x51 Series Datasheet (PDF).