... Description: ·Track by software/by cell phone ·Over-speed alarm, Low power alarm, Geo-fence alarm ·Roaming feature to save cost ·Control ... chipsuper sensitivity and high accuracyLED3LEDs indicate power, GSM, GPS signal, and trembling status( 2 Changer Light )MicrophoneyesHot start1 sec., averageWarm start38 ... tracker, engine on& off, geo-fence control,over speed&low power alarm, mileage calculation