ST-901 with battery: It has built in battery inside for back up (gps tracker can still work for few hours if disconnect with car or motor battery) , and main power off alarm( main power off alarm means sending sms alarm when gps tracker disconnect with car battery, very useful if the thief try to disconnect gps tracker and steal the car).Notice: - GPS Tracker ST-901 is Mini Waterproof Tracker and easy to use with ACC detect igintion,the Quality and Stability more than GT06 GT02 better. - About main power off alarm,it means when gps tracker disconnect the car battery,device will send sms alarm, which is very useful if the thief tries to disconnect gps tracker and steal the car.(this function just works with built battery device). - The IMEI and ID NO, is the unique NO. which can not be changed,It can only use 2G(GSM) SIM card, not available for 3G or 4G and CDMA SIM card. - These countries can not use this product: Japan, Korea, North Korea. And if your country has no 2G sim card, it can't be used either. -The Mini GPS Tracker have ACC detect igintion(orange wire),if you don't need it,then disconnect orange,the tracker still works. -If you have any question or problem please contact us,we will do best to solve your problems. - Before you using the online platform, pls set the server IP,Port and APN(Acess Point Name) of your SIM card by SMS command. - If your sim card has PIN code(the tracker can not read SIM card),please unlock the sim card on your mobile phone. ST-901 Feature: - Operating temperature:-20° to 55° C - Operating Humidity:5% to 95% Non-condensing - GSM Quad Band GSM 850/900/1800/1900Mhz - GPS Chip:UBLOX7020 - GPS sensitivity:--162Db - Location Accuracy:10 meters, 2D RMS - Time Accuracy:1 microsecond time synchronization of satellite time ST-901 Function: - Build-in GPS Vehicles locator. - Support 4-frequency GSM 850/900/1800/1900 MHz which can Work worldwide - Support track the real time address by google link - Built in battery 150 mAh - Support Geo Fence Alarm - Main Power Off Alarm(with built battery only) - Support single location - Support Over Speed Alarm - Support Low Power Alar - Waterproof - With ACC to detect ignition
