Software Compression Card :GV-600(V.3) Video Input(s):4, 6, 8, 10, 12, 14, 16 Cams Audio Input(s):1 channel Recording Rate:30 fps (NTSC), 25fps (PAL). Display Rate:30 fps (NTSC), 25fps (PAL). Video Resolution:320x240, 640x240, 640x480, 640x480sw Compression Format:Wavelet, MPEG-4, GeoMPEG-4 OS:Win2000/Win XP