... via GPRSAlarm types: Over-speed, Low power, Geo-fence,Tremble, Parking, SOS,exterior power off...etc;Control car doors close/open ... status of engine on/off;Cut off the engine power;GPRS(TCP/UDP), SMS Support;Sleep mode for Saving ... ,1800,1900MhzGPS receiver SIRFIII GPS module (position accuracy: 10-15 meters)Power Specification inner battery900mAhExternal supply12-24VPower consumption10 hrs for 10s time ...