Input Type D-Type: DB16 X 2 Video Input(s) 1、4、6、9、13、16 Cams Audio Input(s) 4 channel Recording Rate 120fps (NTSC), 100fps (PAL). Display Rate 120fps (NTSC), 100fps (PAL). Video Resolution 768 x 576, 640 x 240, 320 x 240 Compression Format MPEG-4 File Size 2 ~ 4KB(320 x 240,Medium level) Video Quality 5 Quality Level (low, very low, medium, high, very high) TV Resolution Over 400 TV Line(1 screen) Network LAN, Cable modem, ISDN, PTSN PTZ RS232 (PAN / TILT / Zoom / IRIS) Website 16ch IE IO Card Support yes Other one system support 1~2 cards,16 channels video input max. arbitrary distribute the image resolution of each channel