... to provide standby sleep mode and turn off GPS or 3G, in order to save power; ... vehicle, for mobile transmission, audio, video,and GPS data can be separate connect to the 3G ... VBR, CBR compression 3. Compound packet,video,audio, GPS, Vehicle Speed ,PTZ and alarm in and outVideo input ... Emergency buttonBoard : WCDMA,CDMA 2000,TD-SCDMA 3G modules and GPS modules, plug and play with 3G SIM card, Relay ...