Video/Audio Input	Video Compression:  H.264 Analog Video Input:  4-ch PAL/NTSC Adaptive:  Support Video Input Interface:  BNC (1.0 Vp-p, 75Ω) Audio Compression:  G.711 Audio Input:  4-ch Audio Input Interface:  RCA (2.0 Vp-p, 1 kΩ) Two-way Audio:  1-ch RCA(2.0Vp-p, 1kΩ)
Video/Audio Output	VGA Output:  1-ch, resolution: 1920×1080P/60Hz,1280×1024/60Hz,1280×720/60Hz, 1024×768/60Hz CVBS Output:  2-ch (1 Main Video Out+1 Spot Video Out), BNC (1.0 Vp-p, 75 Ω), resolution: PAL: 704×576, NTSC: 704×480 HDMI Output:  1-ch, resolution: 1920×1080P /60 Hz, 1280×1024 /60 Hz,1280×720 /60 Hz, 1024×768 /60 Hz. Recording resolution:  4CIF/2CIF/CIF/QCIF Frame Rate:  25 fps (P) / 30 fps (N) Video Bit Rate:  32Kbps~2048Kbps, or user-defined (Max.3Mbps) Stream Type:  Video/Video&Audio Audio Output:  2-ch RCA(Linear electrical level, 600Ω) Audio Bit Rate:  64kbps Dual Stream:  Support Synchronous Playback:  4-ch
Hard Disk Driver	Interface Type:  4 SATA interfaces for 2 HDDs + 1 DVD-R/W (default), or 4HDDs Capacity:  Up to 4TB capacity for each disk e-SATA Interface:  1 eSATA interface
External Interface	Network Interface:  1 RJ45 10M/100M/1000M adaptive Ethernet Interface USB Interface:  3 USB2.0 interfaces Serial Interface:  1RS-485 interface, 1 RS-232 interface, 1 RS-485 keyboard interface Alarm Input:  4-ch Alarm Output:  1-ch
General	Power Supply:  100 ~ 240 VAC, 5A, 50~60Hz Consumption:  ≤ 25W (without hard disk or DVD-R/W) Working Temperature:  -10 °C ~ + 55 °C Working Humidity:  10% ~ 90% Chassis:  19-inch rack-mounted 1.5 U chassis Dimensions:  445(W) × 390(D) × 70(H) mm Weight:  ≤ 5kg (without hard disk or DVD-R/W)