... :·Vehicle Tracking·Vehicle Security/Recover/Anti-hijacking·Mobile Asset Tracking·Location-based Services·Fleet Management: car, taxi, bus, truck etc. ... time standby more than three months·Support commands to device via GPRS·SMS Link for google map·Sending GPRS ... LED3 LEDs indicates GSM signal, GPS signal, and changeButton2 buttons, SOS button and button A Car tracker device,Long time standby ,Fuel/oil ...