Mini GF-07 GPS Permanent Magnetic SOS Tracking Devices For Vehicle Car Child Location Trackers Locator Systems Mini GPS Trackers Specifications: Rechargeable, strong magnetic adsorption, recordable, anti-lost positioning for elderly children Material: Plastic Model GF07 memory no memory (M) GPS positioning accuracy 500 (m) Battery type polymer battery life 36h Waterproof function without antenna type GNSS external power supply form built-in power interface text Chinese English type portable Charging input: AC110 - 220V50/60Hz Charging output: DC5.0V 300-500mA Machine battery: 3.7V 400mAh Li-ion battery