QNAP VS-12148U-RP Pro+
48-channel / 12-bay / VGA Local Display / Rackmount Network Video Recorder
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The QNAP VS-12148U-RP Pro+ VioStor NVR (Network Video Recorder) is the high-end 2U chassis network surveillance server which supports high quality real-time video/audio monitoring, megapixel recording (up to 10-megapixel), and playback of multiple IP cameras. The VioStor VS-12148U-RP Pro+ can simultaneously handle inputs from up to 48 megapixel cameras. Featuring a powerful Quad-core Intel® Core™ i5 processor and 8 GB of DDR3 memory, this enterprise-grade NVR delivers high performance with throughput of 450 Mbps for recording and smooth playback of multiple megapixel cameras. Moreover, the HDMI output and hardware decoder of VS-12148U-RP Pro+ provide the ability to deliver up to 300fps Full HD local display.
In addition, when installing with the currently largest 4TB hard drives in the market, the VioStor VS-12148U-RP Pro+ supports up to 48 TB storage capacity, which makes it proficient for continuous recording of high-resolution video.
The Linux-based VioStor VS-12148U-RP Pro+ enables quick and easy deployment of multiple NVRs. It is designed with the user in mind, offering simple and intuitive setup in six steps. Coupled with powerful performance and stability, this solution is tailor-made for enterprise surveillance needs.
Why QNAP NVR?
QNAP VioStor NVR (Network Video Recorder) is designed for high quality megapixel recording, and high performance real-time monitoring. It is a reliable standalone NVR with powerful surveillance features and mass storage capacity. Based on Linux OS, the NVR supports H.264, MPEG-4, M-JPEG and MxPEG recording from over 1,100 network camera models from popular brands. With QNAP's unique multi-server monitoring feature, multiple VioStor NVRs can be cascaded together for central monitoring of up to 128 channels of video surveillance. The VioStor NVR is an ideal solution for small, medium, and large facilities that integrate IP cameras, advanced intelligent video analytics and RAID storage technologies to help companies provide a safe environment for employees and protect company assets.
- Supports a Broad Range of IP Cameras
The VioStor NVR supports H.264, MPEG-4, M-JPEG, and MxPEG recording from over 1,000 network camera models of many popular brands.
- PC-less Network Surveillance by HD Local Display
The VioStor NVR supports PC-less system configuration, monitoring of IP cameras over the network, and video playback by a monitor or high-definiton TV, a USB mouse, and a USB keyboard.
- Multi-server Monitoring
You can connect to the VioStor NVR and add other QNAP NVR servers to monitor up to 128 channels on a PC over LAN or WAN.
- Intelligent Video Analytics (IVA) for Fast Video Retrieval
The VioStor NVR supports intelligent video analytics (IVA), such as motion detection, missing object, foreign object, out of focus, and camera occlusion to provide fast video retrieval.
- Advanced Event Management
The compatibility between the NVR and the surveillance devices are strengthened to provide more event handling options when events are detected or alarms are triggered on the IP cameras.
- Live View on Mobile Devices by VMobile
With VMobile installed on your Android phone, iPad, iPhone, iPod touch, or Windows PDA phone, you can monitor your home and office and receive instant event alert anytime, anywhere.
- RAID Data Protection
The VioStor NVR supports RAID 1, 5, 6, 5+hot spare, 6+hot spare to protect the recording data against hard drive failure. Single disk, JBOD, and RAID 0 are also offered**.
- Convenient Video Backup to External USB Storage
You can press the one-touch-auto-video-backup button on the front of the NVR to copy the data from the NVR to an external storage device.
- Linux-embedded System
The VioStor NVR is a Linux-embedded system which is more powersaving and less vulnerable to virus attack compared to PC-based surveillance solutions.
QNAP Unique Utilities
The QNAP Finder is a value-added utility developed to help you quickly search all the VioStor NVR servers and all major brands of IP-based cameras and network video servers.
The VioStor Player allows you to play the recording files on your Windows computer or the VioStor NVR servers.
Watermark Proof (Installed with VioStor Player)
You can select to add digital watermark on the exported videos and snapshots. The Watermark Proof allows you to check if the exported files were modified.
V-Mobile (for Windows PDA Phone, iPad, iPhone, iPod)
The V-Mobile is a mobile video surveillance utility for you to monitor the network cameras on the VioStor NVR. With V-Mobile installed on Windows PDA phone, iPad, iPhone, and iPod, you can monitor your home and office, check the safety of the children at home and be alerted by the intrusion alarm anytime, anywhere.
* For VioStor Pro series NVR only. ** The RAID levels supported depend on the number of hard drives installed.
Complete Recording Functions
|High Quality H.264, MPEG-4, M-JPEG and MxPEG Recordings (depending on the camera models)|
|All-in-one Recording Functions
The VioStor NVR supports megapixel recordings (up to 10-megapixel) from various IP cameras.
Administrators now can flexibly define multiple video streams (supported by specific camera models) according to bandwidth resources and number of live-view channels. The adjustable video stream setting helps improve the displaying quality of live-view and well manage the bandwidth resources based on different usage requirements.
The VioStor NVR automatically selects video streams from IP cameras for different recording scenarios. In normal situation, video recording maintains at lower quality resolution. While the alarm event happens, video recording switches to high quality resolution to capture more details. In other words, smart recording effectively avoids the constant storage consumption at all time, but achieves greater storage efficiency and boost recording quality when alarm events happen.
|Real-time Digital Watermarking
The VioStor NVR supports real-time digital watermarking to protect the videos and snapshots from unauthorized modifications. The Watermark Proof utility is provided to verify whether or not the videos and snapshots are original.
Network Surveillance with Full HD 1080P Local Display
|Diversified Modes for Local Monitoring
High Resolution Local Display
The VioStor NVR provides an HDMI port which can be connected to an HDMI monitor or TV for doing monitoring in the full HD (1920 x 1080) resolution.
Convenient Control of PTZ and Speed Dome Cameras
The PTZ (Pan/Tilt/Zoom) cameras can be adjusted directly and the preset positions of the IP cameras can be viewed on the local display interface of the VioStor NVR.
Digital zoom (in/out) of the video image is supported on the monitoring and playback interfaces of the NVR.
On-screen Event Alert
When an event occurs, an alert icon will be shown instantly on the local monitoring page. The alert details can be viewed by clicking the alert icon
The VioStor NVR supports convenient video search by date and time on the local playback interface.
Local Video Playbacks on HDMI Monitors or TVs
|Quick System Setup
The VioStor NVR can be set up in simple steps on the local display interface.
Network Surveillance by Web-based Interface to Perform Real-time Remote Monitoring
Use QNAP Surveillance Client for Windows and Mac to watch the live view and play back the recording files on the VioStor NVR.
On the Windows PC, you can also use Google Chrome, Microsoft Internet Explorer, or Mozilla Firefox to enjoy our surveillance features.
Connect to one VioStor NVR and monitor up to 128 channels from other VioStor NVR servers over the LAN or WAN via an IE browser.
Note: The feature is supported by Google Chrome, Microsoft Internet Explorer, and Mozilla Firefox
|Diversified Remote Monitoring Modes
|Smart Control of PTZ & Speed Dome Cameras
The PTZ (Pan/Tilt/Zoom) cameras can be directly adjusted by the web user interface of the VioStor NVR.
|Preset Position Control and Auto Cruising
The preset positions of an IP camera can be viewed by clicking the corresponding number buttons on the monitoring page. The time interval can also be configured on the PTZ cameras to perform periodic monitoring.
|Instant Event Notification
When the alarm recording is enabled and an event occurs, an alarm icon will be shown instantly on the monitoring page. The alert details can be viewed by clicking the icon.
Digital zoom (in/out) of the video image is supported on the monitoring and playback interfaces.
The VioStor NVR provides the E-map function for users to upload the digital maps and indicate the locations of the IP cameras of a monitoring location or region.
Remote Video Playback
Use the multi-view playback feature to divide a video equally into multiple sessions for doing playback in a multi-view window, or play the videos of multiple IP cameras in the multi-view window simultaneously.
Video Search by Date and Time, Timeline, Event, Intelligent Video Analytics (IVA)
The VioStor NVR supports quick video search by date and time, timeline, event, and intelligent video analytics (IVA), which includes motion detection, foreign object, missing object, out of focus, and camera occlusion.
|Advanced Event Management
VioStor NVR supports various event handling options for different kinds of events.
Real-time SMS and Email Alert
Configure the SMTP server and SMSC server settings on the NVR in order to receive instant system warnings or error messages by email and/or SMS
Convenient Backup Solution
VioStor NVR provides surveillance storage expansion solution which enables users to leverage the Turbo NAS storage capacity. By installing the StorageExpansion QPKG in the Turbo NAS, administrators can connect the VioStor NVR with the Turbo NAS to flexibly enlarge the total surveillance storage.
Scheduled Remote Replication
The VioStor NVR supports scheduled remote replication for performing secure data backup to a remote QNAP NAS on the local network.
One Touch Auto Video Backup
Configure the one touch auto video backup button at the front of the NVR to copy the data from the NVR to an external storage device when the button is pressed.
Excellent Hardware Design
Intel® CPU and DDRIII Memory for Superior System Performance
Powered by the Intel® CPU and DDRIII memory, the VioStor NVR delivers superior performance for surveillance applications.
Linux Embedded System
The Linux-based VioStor NVR is more power-saving and less vulnerable to virus attacks compared to the PC-based surveillance solution.
Huge Storage Capacity for Long-term Recordings
The VioStor NVR supports RAID 0, 1, 5, 6, 5+hot spare, single, and JBOD disk configurations. Its hot-swap design allows a failed drive of a disk volume (RAID 1 or above) to be replaced by hot swapping without turning off the server.
Mobile Surveillance by VMobile
Use the VMobile network surveillance application on Android phone, Android Tablet, iPhone, iPad, or iPod touch to easily access video management functions Multi-view Playback Use the multi-view playback feature such as remote live view and playback recordings. In addition, the account on the VioStor NVR can be used to connect to an unlimited number of NVRs and IP cameras by VMobile through Wi-Fi, 3G, or 4G networks.
The fisheye dewarping function, available on the web and local display interface for specific fisheye cameras and specific cameras with panomorph lens, assists in doing practical surveillance management, allowing the administrators to view the monitoring area in a clearer shape.
The VioStor NVR supports automatic user logoff from idling configuration pages. The administrator can set the timeout period to log off the users when the idling time has been reached.
|Host Access Control
Specify the host or IP connections to be allowed or denied to access the NVR.
|On-line User List
View the record of users currently logged on and previously logged on to the NVR.
|Detailed Event Logs
The VioStor NVR provides detailed event logs of system warnings, hard disk errors, network disconnections, UPS status, and access to the networking services of the NVR and video recordings
High Reliability and Smart Features
Advanced RAID with Hot-swap Design
The VioStor NVR supports RAID 0, 1, 5, 6, 5+hot spare, single, 6+hot spare and JBOD disk configurations. Its hot-swap design allows a failed drive of a disk volume (RAID 1 or above) to be replaced by hot swapping without turning off the server.
|Online RAID Capacity Expansion and Online RAID Level Migration
|S.M.A.R.T. & Advanced HDD Health Scanning (HHS)
S.M.A.R.T. (Self-Monitoring Analysis and Reporting Technology) helps monitor the hard disk drives status. The VioStor NVR supports HHS (HDD Health Scan) for doing disk checking and bad blocks scanning.
|Automatic System Startup after Power Recovery
The VioStor NVR supports automatic system startup after a power recovery.
|UPS Support for 24/7 Service
The VioStor NVR supports APC, CyberPower, MGE, and YEC UPS devices to provide continuous services 24/7 against unexpected power outages.
DOM Architecture with Embedded Fail-safe Dual OS for Enhanced Reliability
All the OS and applications of the VioStor NVR are embedded in the DOM. The VioStor NVR allows system booting without accessing the physical disk sectors to prevent from unsuccessful system startup caused by bad blocks or file errors on the hard drives. Two operating systems are built on the DOM to boot the system alternatively upon every system startup. When one fails, the other one can be used for system startup and the failed OS is recoverable from the other healthy OS.
Dual Gigabit LAN Ports
This mode allows the VioStor NVR to sustain the failure of one network port to provide continuous services.
- Load Balancing
This mode provides bandwidth aggregation to boost the file transfer speed (works with managed Ethernet switch with 802.3ad configured).
- Multi-IP Settings
Two IP settings can be configured on the NVR to allow network access from two different subnets.
Built-in DDNS Service
The VioStor NVR supports dynamic DNS (DDNS) for convenient access to the system by a domain name instead of a lengthy IP address.
Built-in NTP Server
This feature allows the connected IP cameras to synchronize their date and time settings with the NVR.
Convenient Data Access
The video data on the VioStor NVR can be accessed via the following protocols with proper access rights:
- SMB/CIFS (Windows).
- HTTP (Web file management)
Easy Configuration and Management
System Setup in Simple Steps
The NVR can be set up in 6 simple steps via the local display or web-based interface (Internet Explorer).
Web-based User Interface
All the system configurations, monitoring, and playback features of the NVR can be managed by the web-based interface.
Smart Search of IP Cameras for Quick Settings
QNAP provides an intelligent software utility, Finder, to search for IP cameras and configure the system settings on the local network quickly.
Advanced Event Management:
Advanced event management can be divided into two parts:
The VioStor NVR supports different event types, including motion detection, alarm input, connection failure, recording failure, and user-defined event to trigger follow-up actions.
When the IP camera detects any movement, the defined actions will be activated.
When the VioStor NVR receives a signal from the IP camera's alarm input, the defined actions will be activated.
When the VioStor NVR fails to connect to the IP camera, the defined actions will be triggered.
When the VioStor NVR fails to record video due to hard drive failure or system crash, the defined actions will be triggered.
The VioStor NVR supports user-defined events. The administrator can enter the CGI command in the browser to trigger the event, and the defined actions will be activated.
The NVR supports different actions when an event is triggered. These actions include multi-channel recording, adjusting the PTZ camera to the preset position, alarm output, built-in buzzer, email & SMS alert, and user-defined action.
When an event is triggered, the VioStor NVR starts recording one or more channels at the same time.
When an event occurs, the PTZ camera will be adjusted to the specified preset position for monitoring and recording. Use HTTP URL to activate further actions.
When an event occurs, the alarm output from the IP cameras will trigger other alert systems, such as lighting system, auto phone dialing system, security system and so on**.
The VioStor NVR sends an SMS message to inform the specified recipients when an event occurs.
When an event occurs, the VioStor NVR sends an email with snapshot to notify the specified recipients.
The buzzer of the VioStor NVR will sound when an event occurs.
The VioStor NVR supports user-defined actions. Enter the HTTP URL from other surveillance systems. When an alert occurs, the NVR will activate other systems, such as extinguishing system, electronic control system, and air conditioning control system.
* The administrator can enter the following URL in the browser to trigger the event: http://NVR IP/cgi-bin/logical_input.cgi?name=User-defined Event Name ** The VioStor NVR supports the alarm output of AXIS, Panasonic, SONY, ACTi, and VIVOTEK camera models.
Use the multi-view playback feature to divide a video equally into multiple sessions for playback in a multi-view window, or play the videos of multiple IP cameras in the multi-view window simultaneously.
|Real-time Digital Watermarking
The VioStor NVR supports digital watermarking to protect the videos from unauthorized modification.
|Data Search by Date & Time, Timeline, Event, and Intelligent Video Analytics (IVA)
The VioStor NVR supports quick search of recording data by date and time, timeline, event, and intelligent video analytics (IVA), including motion detection, foreign object, missing object, out of focus, and camera occlusion.
Detects movement in the video. The moving objects of the search area are highlighted in red brackets.
Detects a new object in the video. The foreign objects of the search area are highlighted in yellow brackets.
Detects a missing object in the video. The missing objects of the search area are highlighted in yellow brackets.
|Out of Focus:
Detects if the IP camera is out of focus.
Detects if the IP camera is obstructed.
QNAP Network Attached Storage (NAS) Solution for Surveillance Applications
High Capacity, Reliability, and Availability Storage Solutions for Video Recording
Turbo NAS Series for Recording Storage Expansion
System Management Tools
High Reliability and Smart Features
Storage Expansion for Video Recording
Central Management System
Manage and monitor up to 128 IP cameras centrally on a single Turbo NAS by connecting multiple Turbo NAS units to minimize management efforts.
Manage large-scale cameras
By connecting multiple Turbo NAS units, you can manage, monitor and play back up to 128 IP cameras managed by the Turbo NAS at the same time from a single unit. This scalability provides greater flexibility for deploying a smaller surveillance system in the beginning and expanding the surveillance scale in the future when needed.
|VS-12148U-RP Pro+ Specifications|
|Processor||Quad Core Intel Core™ i5 3.7GHz Processor|
|DRAM||8GB DDR3 RAM|
|HDD Capacity||12 x 3.5” SATA 6Gb/s, SATA 3Gb/s hard drive
Note: The system is shipped without HDD.
|Hard Drive Tray||12 x hot-swappable and lockable tray|
|LAN Port||4 x Gigabit RJ-45 Ethernet port|
|LED Indicators||Status, 10 GbE, LAN, eSATA, hard drives
*10 GbE (reserved), eSATA (reserved)
|USB||2 x USB 3.0 ( back:2)
4 x USB 2.0 ( back:4)
Exporting recording file in playback by USB3.0 ports only.
|Buttons||Power button, reset button|
|Alarm Buzzer||System warning|
|Form Factor||2U, Rack mountable|
|Dimensions||88(H) x 439(W) x 520(D) mm
3.46(H) x 17.28(W) x 20.47(D) inch
|Weight||Net weight: 15.88 kg (35.01 lb)
Gross weight: 25.60 kg (56.44 lb)
|Temperature||0~40˚C / 32~104˚F|
|Relative Humidity||5~95% RH non-condensing, wet bulb: 27˚C.|
|Power Supply||Input: 100-240V AC, 50/60Hz,
|Power Consumption (W)||167W Write/Read (with 12 x 2TB HDD installed)|
|Expansion Slot||2 (reserved for network and storage expansion)|
|Video Output||1 x HDMI
1 x VGA
|Fan||3 x 6cm smart cooling fan|
|Certification||CE, FCC, VCCI, BSMI, C-Tick|
The VS-12100U-RP Pro+ rack mount series comply with ANSI/EIA-RS-310-D rack mounting standards. Before purchasing the server racks for these models, please make sure the server racks conform to the following criteria:
- Rack size
- Mounting post width: ≥ 451mm
- Panel width: ≥ 500mm
- Mounting post depth: 650mm~850mm
- The rack kits for the VS-12100U-RP Pro rack mount series are only compatible with square-hole server racks.
|Supported Camera Models||Please visit http://www.qnapsecurity.com|
|Number of Channels Supported (Recording)||Up to 48|
|Video Compression||H.264/ MPEG-4/ M-JPEG/ MxPEG (depending on the camera models)|
|Video Setting||Video compression, resolution, quality, frame rate, audio|
|Buffer Storage for Alarm Images (before and after events)||
|Recording Performance||Up to 30 fps at 1080P, 720P, VGA for each channel
* Real performance may vary in different environment
|Megapixel Recording||Supports megapixel cameras (up to 10-megapixel)|
|Network Throughput||450 Mbps|
|File Format||AVI (QNAP codec is required for playback)|
|Recording Enhancement||Real-time digital watermarking|
|Fisheye Dewarping||Support the specific fisheye IP Cameras on remote monitoring/playback and local display interface|
|360° Panomorph Video||Support the specific IP camera with panomorph lens on remote monitoring/playback and local display interface|
|Display Mode||1, 4, 6, 8, 9, 10, 12, or 16-channel display mode, sequential display mode|
|Hardware Decode||Full HD 1080P 300FPS
*The NVR will auto detect H.264 stream format and activate hardware decoder for 12 CH live view.
|Local Monitoring Enhancement||Full screen display, event notification, PTZ control, digital zoom|
|Local Playback||Single view playback from local NVR server|
|Search Mode for Local Playback||By date & time|
|Playback Control||Play, pause, stop, reverse play, next/ previous video file, different speed control|
|Local Playback Enhancement||Full screen display, digital zoom|
|Export||Convert multiple recording files to the external USB device instantly|
|System Administration||Quick configuration, administration password, network settings, time settings, disk volume configuration, camera settings|
|Display Mode||1, 4, 6, 8, 9, 10, 12, 16, 20, 25, 36,42 or 64-channel display, sequential mode|
|Dual-display mode||Up to 2 monitors|
|Multi-server Monitoring||Up to 128-channel monitoring from multiple VioStor NVR servers (browser-based)|
|Monitoring Enhancement||Full screen display, video snapshot, manual recording, event notification, PTZ control, digital zoom|
|E-map||Uploading the digital maps and indicating the locations of the IP cameras and GPI devices of a monitoring location or region|
|Display Mode||1, 4, 6, 8, 9, 10, 12 or 16-channel display|
|Search Mode||By date & time, timeline, event, and intelligent video analytics (IVA)|
|Intelligent Video analytics (IVA)||Motion detection, missing object, foreign object, out of focus, and camera occlusion|
|Playback Mode||Play, pause, stop, reverse play, next/ previous frame, next/ previous video file, different speed control|
|Playback Enhancement||Full screen display, video snapshot, digital zoom, digital watermarking|
|Export||Convert multiple recording files to client PC instantly|
|Download||Download recordings via the web|
|QNAP Surveillance Client for Mac|
|Display Mode||1, 4, 6, 8, 9, 10, 12, or 16-channel display mode, sequential display mode|
|Monitoring Enhancement||Full screen display, event notification, PTZ control, digital zoom|
|Playback||Single view playback|
|Search Mode for Playback||By date & time|
|Playback Control||Play, pause, stop, reverse play, next/ previous video file, different speed control|
|Playback Enhancement||Full screen display, digital zoom|
|Export||Convert multiple recording files to Mac device instantly|
|Advanced Event Management|
|Events||Motion detection, alarm input, connection failure, recording failure, and user-defined event|
|Actions||Video recording, email alert, SMS alert, buzzer, PTZ camera control, alarm output, and user-defined action|
|Schedule Remote Replication||Schedule video data backup to a NAS on the local network|
|Authority Management||Different user groups and rights can be assigned to different users|
|Host Access Control||Specify the connections to be allowed and denied to access the VioStor NVR|
|Auto Logoff||Automatic user logoff from idling configuration pages|
|Event Logs||Detailed event logs|
|On-line Users List||Record of the users currently logged on and previously logged on to the VioStor NVR|
|Digital Watermarking||Verify whether or not the videos and snapshots are original|
|Operation System||Linux-embedded system, free from PC crash and virus attack|
|UPS||APC/ CyberPower/ Epson/ MGE/ YEC (USB UPS)|
|Support||HTTP, TCP/IP, SMTP, DHCP, Static IP, DNS, DDNS, FTP, NTP, UPnP, failover, load-balancing, multi-IP setting|
|Dual Gigabit LAN||Failover / load-balancing / multi-IP setting|
|Services||Web File Manager, FTP, SMB/CIFS|
|Language||Czech, Danish, Dutch, English, French, Finnish, German, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Spanish, Swedish, Simplified Chinese, Traditional Chinese, Turkish|
|Client PC||Google Chrome, Internet Explorer, Mozilla Firefox (Browser-based)
QNAP Surveillance Client for Windows
|Mac||QNAP Surveillance Client for Mac|
|Android Tablet, phone||VMobile|
|iPad, iPhone, iPod Touch||VMobile|
|Windows Mobile (6.1, 6.5) Device||VMobile|
|Client PC Requirement (Suggested system requirement for better video performance)|
|Memory||4 GB or above|
|Operation System||Microsoft Windows Vista/ 7/ 8 or Mac OS X 10.7.x, 10.8.x|
|Web Browser||Microsoft Internet Explorer 8/9/10/11 (Windows PC, desktop mode, 32-bit)
Google Chrome 34.0.1847.116 m (Windows PC)
Mozilla Firefox 28.0 (Windows PC)
|Network Interface||10/100/1000 Mbps|
|Display Resolution||1280 x 800 pixels or higher for better user experience|
|QNAP Finder||The client application to discovery and quick setup of the VioStor NVR|
|QNAP Surveillance Client For Windows||The client application used to remotely access QNAP NVR servers for performing video monitoring and playback functions on client PC.|
|QNAP Surveillance Client For Mac||The client application used to remotely access QNAP NVR servers for performing video monitoring and playback functions on Mac.|
|QNAP Codec||The video codec to play the recording files on Windows Media Player.|
|VMobile||The Mobile App to monitor the network cameras on the VioStor NVR by the Android phone, Android tablet, iPhone, iPad, iPod touch, and Windows mobile (6.1, 6.5) device.|
||Left Angle View
||Right Angle View
|Left Side View
||Right Side View
||Drives Pullout View
Download the QNAP Network Video Recorder and QVR Datasheet (PDF).