GPS Tracker Master 2 GSM SIM cardwhen a phone card balance is insufficientit will automatically converts to another card - Remote engine/oil stopanti-theft - Support remote controlarm & disarm & SOS & searching cars - Easy to swap SIM card and SD card - Location based service(LBS) - Real time tracking voice monitoring function - Geo-fence movement over-speed low battery alarm. - SOS panic button - SMS tracking on cellphone with Google map link. - Get absolute address including street name by sms - Web based online tracking server - Remote software upgrade - Total mileage calculation - New patent design of appearance - Application: Anti-theft car security remote engine/oil cut-off vehicle rental / out-door machines and equipment etc Product Function: - SiRF III GPS and Quad Band GSM 850/900/1800/1900MHz - AGPS ( with GSM Base Station ID) - Track by SMS/GPRS (TCP/UDP) - Track on demand - Track by time interval - Track by distance interval - Track on mobile phone - Built-in motion sensor - 850mAh internal backup battery - SOS alarm - Geo-fence alarm - GPS blind area alarm - Low battery alarm - Speeding alarm - Tow Alarm - GPS antenna cut alarm - External power cut alarm - Mileage report - Engine cut (Engine immobilization) - Built-in super magnet