The Spy Spot Kit Power Supply is an additional accessory for the Micro Portable GPS Trackers that will keep the GPS charged through a 12 Volt Power supply. The Hardwired Power Supply Kit is simple to install and charges the GPS Micro Tracker whenever the engine or other circuit is on, so you do not need to recharge the device. The device will power any Gl200, GL300, GL300W, and GL300VC