Gps Locator WL-GPS306 mainly used for vehicle management and location tracking services, we also can say Gps Tracking for cars. Basically, it is a plug and play device and allows the device to be moved from one vehicle to another just in  seconds. Because of the internal battery backup This device charge itself when it plugged into your cars OBD || Port. This tracker is offered pre-configured and topped-up with 5pound credits that can provide between 6 to 10 weeks of unlimited internet tracking.