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 x 2 Video Input(s)4, 8, 12, 16 CamsAudio Input(s)2 Channels , & 16CH(with GV-A16 board) is optionalRecording Rate 60 fps (NTSC), 50 fps (PAL). Display Rate60 fps (NTSC), 50 fps (PAL). Video Resolution NTSC: 720x480, ...