A REXlink Easy 4G GPS tracker installed in a motorhome allows remote monitoring of location, door opening and battery voltage. The device has a shock sensor and its own SIM card; when the security mode is triggered, the owner receives a notification. During long storage the tracker consumes minimal power, but it is recommended to recharge the battery when voltage drops to 12.4–12.5 V. This can be done with a smart charger or by removing the battery, though the latter cuts power to the tracker.