Video input: 1-8 channels composite video signal Audio Input: 1-8 channels Display Rate: 120fps(NTSC), 100fps(PAL) Compression Format: MPEG4; G729 Video Resolution: 352*288(PAL), 352 x 240 (NTSC) No need of CPU intervention,save CPU resource greatly OS:Windows 2000 / XP Support PTZ,Alarm control, Real time display and record Provide Original Copyright Software and function SDK Hardware compression