1.CUSTOMER SERVICEPlease feel free to contact our customer service if you have any problems. NOTE: SIM card not include, you need to buy a local SIM card with 2G (GSM) functions, insert it to the tracker.(Battery use life depends on how often the device is used. Higher frequency to use, the shorter battery time. Lower frequency to use, the longer battery time) 2.MAIN FUNCTION vehicle mini car tracker devices for Motorbike. vehicle tracking device very simple and easy to use for Motorcycle, Truck, Taxi, personal, etc. Text message alerts for movement, speeding, leaving or entering areas, low battery, Shocking, driving reports historical data saved during service. This gps tracker devices built-in 3.7 V 400 mah Li - ion Standby backup battery. GPS tracker for hidden with voice monitor function