4 Channels , & 16CH(with GV-A16 board) is optional Specifications Input TypeD-Type: DB15 x 2 Video Input(s)8, 16 Cams Audio Input(s)4 Channels , & 16CH(with GV-A16 board) is optional Recording Rate240 fps (NTSC), 200 fps (PAL). Display Rate240 fps (NTSC), 200 fps (PAL). Video ResolutionNTSC: 720x480, 720x480 de-interlace, 720 x 240, 640 x 480, 640 x 480 de-interlace, 640 x 240, 320 x 240PAL: 720 ...