ModelA21Userkids,cars, elderlyStructureColorblackNetweight36gSize52X38X16mmButtonsPowerbutton(P)andfunctionbutton(F)GSMantennaFour frenquency PIFA antennaBattery1000mAhSIMcardslotoneslotI/OportMagnetic suction chargingHardwareChipsetMTK MT2503AGPRSClass12GPSsingalL1,1575.42MHzC/AcodeGPSchannels22channelsGPSchipTrackingSensitivity:-165dBm,acquisitionsensitivity:-148dBmGPSaccuracy5~15mLBSaccuracy100-1000mMinimumstandbycurrent<0.5mAAveragestandbycurrent<2.5mAAverageworkingcurrency<55mAWorkingtemperature-20~70ºCworkinghumidity5%to95%GPSantennaBuilt-inhighsensitivityceramicantennaGSMantennaFourfrequencyPIFAantennaBluetoothbluetooth 3.0(Normal closed)G-sensorSupportMICSupportSoftwareSupportedOSSupportandroid2.3orabove,IOS5.0oraboveLanguagesChinese/EnglishGSM+GPRS+GPSGPS+LBS+Wifi positioningAGPSCoolstart26spositioningPowermanageUltra-lowpowerconsumptionofpowermanagement,intelligentdormancyRecord functionchoose the record function on the APP, and then the device can be record actomate, after record,will send back to APP directly.GeofenceOutside the range setting can be automatic alarmHistoricaltrackThreemonthes'shistoricaltrack