Video Input：4ch, Audio：1ch（input through sound c with microphone）CompressionFormat:H.264 / MPEG-4 in choice;Frame:100fps/second（PAL）　9 bit ADC，better than other hardware and software card with 8 bit　;　Display resolution：640X480、352 X288、320X240 Recording resolution：640X480、352X288、320X240 Compression ratio：8-150M/H/C;HD Space: 8-150M/H/C;support intelligent search of the DVR document according to date sepuence and multi-channel playback,speed control,pictures printing,image catch when playback