Quick & Simple 2 Wire Installation: turn your Micro Tracker into a vehicle watchdog with this Hard-Wired Power Kit | Charges the Tracker Battery whenever the engine, a tail light or other circuit is on | May be wired to always provide an electrical current to the tracker battery depending on how the cable is installed | Versatile Tracking: this accessory makes your Micro Tracker the most versatile tracking tool ever | Compatible with the portable GPS Model GL200 & GL300