4ch, 8ch, 12ch, 16ch, video can be choosen 2ch and 16ch audio can be choosen MPEG-4 dvr card system need: windows2000/XP/2003 ... GV-650 DVR card Specification Input Type D-Type: DB15 ... , MPEG-4, GEOMPEG4 GV-DSP Support YESYES ()GV-NET/IO Card Support YESSoftwareV8.0 / V7.05 / V7.0(with ) / V6.1 ...