Our KVC-6408C DVR card has following features: Video Input：PAL（625 L/F, 25F/S）NTSC（525 L/F, 30F/S）compound video input（BNC port，1VP-P,75Ω） Video Output： PAL（625 L/F, 25F/S）NTSC（525 L/F, 30F/S）A composite video output（BNC port，1VP-P,75Ω）A VGA output (frequency：60HZ，resolution rate：1024*768) Audio Input： 8 channel audio input (lotus，20-100mv, 10KΩ) Audio Output： an audio output（lotus，20-100mv, 1KΩ） Alarm input： 9 alarm input Alarm output：4 alarm output Video System：NTSC/ PAL Compression Tech：video compression：H.264；audio compression：G.722 Image Resolution Rate： real-time display(704*576), VGA output（1024*768） Audio sampling rate： 8K sampling point per second，16 bit per sampling point Record definition： There are three (H:D1 only for real-time display; M:HD1 playback definition only when the working mode from 16-ch to 8-ch ; L：CIF playback definition when the working mode is 16-ch) Image quality There are six in all, from high to low (1, 2, 3, 4, 5, 6) Record video file size as follows only for reference) D1: quality 1-700M/H, 2-500M/H, 3-400M/H, 4-320M/H, 5-260M/H, 6-200M/H Half-D1: quality 1-350M/H，2-250M/H，3-200M/H，4-160M/H，5-130M/H，6-100MHCIF: quality 1-150M/H，2-100M/H，3-80M/H，4-70M/H，5-50M/H，6-40M/H Operating system： Embedded real-time operating system (RTOS) Port of the hard disk： PATA, SATA Port of I/O： RS485, alarm input/output Port of the network：Adaptive Ethernet port of 10M/100M Power supply： 220?30% V, 50?3% HZ110?0% V，60?% HZ optional Consumption of the machine (without hard disk): 30W（KDR-908，KDR-916）20W（KDR-904）25W（KDR-904A） Dimension (mm)：440 ?436?96.2