Extended battery 8 cells and magnetic case lasts 8 months for GL200, GL300, GL300W, GL300VC, Spark Nanno, Enduro PRO, Amcrest, Spy Tec STI_GL300 Perfect fit for Queclink 200, GL300, GL300W, GL300VC, Spark Nanno, Enduro PRO, Amcrest, Spy Tec STI_GL300 and SilverCloud Tag POWERFUL 8 cell battery lasts up to 8 months. RARE-EARTH magnets ensures the device stays attached to the vehicle in all conditions. Weatherproof and air tight keeps your investment safe. GPS Tracker NOT included