1. GPS tracker 2. Real time moitoring 3. remote ... -speed, Low power, Geo-fence,Tremble, Parking, SOS,exterior power off...etc;Control car doors close/open ... viberation sensor;);Backup battery;Two way voice communication;GPS antenna drop alarm;Temperature sensor;5. Spcification FeatureSpecificatioinsize ... quad-band: 850,900,1800,1900MhzGPS receiver SIRFIII GPS module (position accuracy: 10-15 meters)Power ...