The BlueFire Data Adapter is an electronic device that connects to your truck, motorhome, or fire engine's on-board computers (ECUs) and transmits information wirelessly via Bluetooth to the BlueFire mobile applications (Trucks, Motorhomes, Firefighters, etc). The Adapter plugs into the 9-pin Deutsch diagnostic port of any Class A Motorhome or Class 3 through 8 heavy duty truck. The Adapter is constructed of industrial grade materials, will withstand abuse, and is weather resistant.