Model Number	V-TVR304
Video compression	H.264
Analog and HD-TVI video input	4-ch, BNC interface (1.0Vp-p, 75Ω)
Supported camera types	720P25, 720P30, 720P50, 720P60, 1080P25, 1080P30, CVBS
Audio compression	G.711u
Audio input / Two-way audio in	1-ch, RCA (2.0 Vp-p, 1 KΩ)
Video Output	1 HDMI, 1 VGA
HDMI / VGA output	1920 × 1080 / 60 Hz,1280 × 1024 / 60 Hz, 1280 × 720 / 60 Hz, 1024 × 768 / 60 Hz
Encoding resolution	Main stream: 1080P(non-real-time) / 720P / VGA / WD1 / 4CIF / CIF; Sub-stream: WD1(non-real-time) / 4CIF(non-real-time) / CIF / QCIF / QVGA
Frame rate	Main stream: 1/16 fps ~ Real time frame rate
	Sub-stream: 1/16 fps ~ Real time frame rate
Video bitrate	32 Kbps-6 Mbps
Audio output	1-ch, RCA (Linear, 1KΩ)
Audio bitrate	64 Kbps
Dual-stream	Support
Stream type	Video, Video & Audio
Synchronous playback	4-ch
Playback resolution	1080P / 720P / VGA / WD1 / 4CIF / CIF / QVGA / QCIF
Remote connections	128
Network protocols	TCP/IP, PPPoE, DHCP, DNS, DDNS, NTP, SADP, SMTP, SNMP, NFS, iSCSI, UPnP™, HTTPS
SATA	1 SATA interface
Capacity	Up to 4 TB capacity for each disk
Network interface	1; 10M / 100M self-adaptive Ethernet interface
Serial interface	1; standard RS-485 serial interface, half-duplex
USB port	2 × USB2.0
Power supply	12V DC
Consumption (without hard disks)	≤ 15W
Working temperature	-10 ºC ~+55 ºC (14 ºF ~ 131 ºF)
Working humidity	10% ~ 90%
Chassis	1U chassis
Dimensions (W × D × H)	315 × 242 × 45mm (12.4 × 9.5 × 1.8 inch)
Weight (without hard disks)	≤ 1.5Kg (3.3lb)