Video Input：4ch, Audio：1ch（input through sound card with microphone CompressionFormat:H.264 / MPEG-4;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。