R50-2040HD: 4 channel video inputs, 4 channel audio inputs, 4 channel loop outputs and 1 channel matrix output. The 1st video channel can support max D1(4CIF) realtime recording and other channels can support CIF realtime recording. It can support VGA, HDMI, eSATA, USB2.0 and 8 HDDs.

R50-2080HD: 8 channel video inputs, 8 channel audio inputs, 8 channel loop outputs and 1 channel matrix output. The 1st video channel can support max D1(4CIF) realtime recording and other channels can support CIF realtime recording. It can support VGA, HDMI, eSATA, USB2.0 and 8 HDDs.

R50-4061HD : 16 channel video inputs, 16 channel audio inputs, 16 channel loop outputs and 1 channel matrix output. The 1st and 9th video channels can support max D1(4CIF) realtime recording and other channels can support CIF realtime recording. It can support VGA, HDMI, eSATA, USB2.0 and 8 HDDs

4/8/16 channels high performance standalone DVR

Up to 4/8/16 cameras with full HD 1080P display

H.264 video compression algorithm ideal

Each channel at CIF and special channel at D1 recording

Dual encoding streams supported

TV(BNC)/VGA/HDMI synchronous video output

Simultaneous live, recording, playback, backup & remote access

16 channel simultaneous playback

Smart video detection: MD, camera blank, video loss

3D intelligent positioning with CQR PTZ dome

Easy backup: USB devices, CD/DVD-RW & network download

Alarm triggering screen tips, buzzer, PTZ, e-mail, FTP upload

Up to 8 SATA HDDs & CD/DVD-RW, 1 eSATA, 2 USB2.0

Built-in web server, multi-DVR client, MSS & CMS