1,Compression Arithmetic: Video compression H.264 Audio compression G.729 2,Video Parameters: Input :PAL ,NTSC 4 Channel compound video input (BNC port, 1VP-P, 75ohm) Output: PAL ,NTSC A composite video output (BNC port, 1VP-P, 75ohm) VGA output frequency:60-85hz resolution ratio:480*320-1024*768 3,Audio Parameters: Input:4 Channel (lotus, 20-100mv ,10Kohm) Output: lotus, 20-100mv ,1Kohm 4,Preview resolution real-time display 704*576 5,Video compression 352 *288(CIF) 6,Audio Sampling ratio: 8Khz,16bit 7,Operating System: Embedded real-time operating system(RTOS) 8,Network port: Adaptive Ethernet port of 10M/100M 9,HDD: Support 4 SATA 10,Series port: RS485 11,Backup: SATA, Network 12,Power supply: 220+-30%v, 50+-3%HZ 13,Power Consumption(without hard disk): 20w 11,Working temperature: -10 to 55 12,Working humidity: 10%-90% 13,Dimension: 440mm(L)*435mmW)*96.6mmH) Contact: polly E-mail: