Standard GPS Car Alarm Hoping Code Technology Real Time Tracking on Network Using GPRS 850/900/1800/1900MHz Frequency E.2001 Standard & Advanced GPS Car Alarm Main Functions 1) Audio alarming by phone & siren, and send position information to user by SMS2) Car positioning function3) Vibration, door opening, power-off, emergency alarm4) Remote listen in, broadcast, cut off gas/power to stop car by ...