The description:Small and light, stable performance and simple operationDesigned with a magnet, stick the device to any metal surface of your choice and it won't fall off.Long standby time, equipped with large capacity battery.Support location technology, WIFI, LBS, applicable to as many occasions as possible.Ideal for tracking vehicles, children, elderly, keys or other valuables.specification:Model: GF22Positioning accuracy: 50mAlarm mode: SOS alarm, fence alarmBattery type: polymer batteryBattery life: 84hWaterproof function: noneAntenna Type: LBS+WIFI+External power form: USBMaterial: plasticSize: approx. 42x26x15mmThe package includes:1 Piece GSM Device1 Piece USB CableRemark:Color may be slightly different due to the color calibration of each individual monitor.Please allow slight measurement deviation due to manual measurement.