Compatible with towing systems or bike racks equipped with a 7-pin plug. It can optionally be connected to a 13-pin plug using a 7/13 adapter. Compatible with vehicles equipped with a CAN-BUS system, LED brake lights, and bulb brake lights. 7-pin set with a power input of 2 mA. Automatic trailer detection. Light switching for daytime running lights. Compatible with LED and single filament lighting.