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