CCTV DVR Card GV-800S 1.Video Input 4, 8, 12, 16 Cams 2.Audio Input 4 Channels 3.16CH(with GV-A16 board ... ) is optional CCTV DVR Card GV-800S ... SpecificationsInput TypeD-Type: DB15 x 2Video Input(s)4, 8, 12, 16 CamsAudio Input(s)4 Channels , & ... order quantity is 50pcs above each model. CCTV gv800 dvr card