Features 1. Track on command or by time interval. 2. Arm/disarm by SMS or phone call. 3. Check the car's real physical address (such as city name, street name.) directly without server's support; 4. Track by mobile SMS to get the latitude, longitude, speed, direction & odometer etc. 5. Check the location directly by the Google map's URL; 6. Online tracking by website, supports 2 GPRS protocols; 7. Odometer function 8. Over-speed alarm; 9. Movement alarm which can be used as an alarm; 10. Engine on alarm; 11. Vibration alarm; 12. Built-in rechargeable backup battery; when the car battery is cut off or low enough, the system will send out power failure alarm immediately; 13. Cut off engine to stop the car safely by SMS/GPRS; 14. Wide working voltage range, from 6V-45VDC, suitable for motorcycle, car or some big truck with normal voltage. 15. Power save design.