Major function: - GPS+LBS+WIFI positioning - 4-frequency GSM 850/900/1800/1900 MHz which can Work worldwide - track the real time address - Built in battery 800 mAh - Geo-Fence - One-touch recording - voice communication - Magnetic adsorption - Low Power Alarm - Waterproof - Support Multiple platforms: IOS/android/web /APP - Historical track playback Specifications: Model   fastener GPS tracker GSM frequency band   850/900/1800/1900MHz GPRS standard       Class 12, TCP/IP Working temperature      -20ºC ~ +70ºC   Working humidity         5% ~ 95% RH measure     53(L)x32(W) x15(H)mm product weight          25g Total weight 144g Packing size 11.5cm  * 7.5cm * 3.5cm Battery capacity 800mAh