Type: Magnetic GPS LocatorMaterial: PlasticColor: BlackDimension: 1.57x0.91x0.63inch(40x23x16mm)Talk Time: 150 - 180 minutesWorking Time: 4 - 6 daysExpansion Card: Mini TF cardNetwork: GSM/GPRSGSM Band: 850/900/1800/1900MhzGMS Locating Time: 25 SecondsPower Input: AC 110-220V 50/60HzPower Output: DC5V 300 - 500mABattery Capacity: 3.7V 400mAh Li-ion BatteryWorking Voltage: 3.4 - 4.2V DStorage Temp.: 40 to 85 CelsiusOperation Temp.: 20 to 55 CelsiusHumidity: 5%-95% non-condensingWarning: Must insert SIM card before charging.