Specification: Product name: GF-07 Real Time Tracking Positioner GPS Tracker Size: 4*2*1.5cm Material: ABS GPS positioning accuracy: 500m Battery life: 96h Memory: No memory Form of external power supply: Built in battery Battery type: Polymer battery Standby time: 12days working hours: 4-6days Network system:GSM/GPRS Working voltage: DC 3.4-4.2V Positioning time: 25s Color: Black