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The Samsung SRD-470D-2TB 4-Channel DVR with DVD R/W (2TB) consists of a 4-channel video input, and offers H.264 image compression at 4CIF/CIF, which provides high quality recording and video playback. It has a 2TB HDD capacity, and comes with a built-in DVD-RW. The DVR offers a combined BNC and VGA video output for main display (up to 1280 x 1024).Watermark data authentication ensures data integrity. The SRD-470D-2TB 4-Channel DVR consists of 4 channel audio inputs, and 1 channel audio output, and features the ADPCM audio recording format. It delivers real-time recording rates of 120ips at 704x480 NTSC resolution. The DVR supports SATA I/F HDDs (internal max. 1 HDD), and has 3 USB ports for data back-up and a built-in web viewer. It also supports various protocols like TCP/IP, DHCP, PPPoE, SMTP, NTP, HTTP, DDNS, RTP, and RTSP.