This kit includes a smart 7 way bypass relay, cable needed to run live wire down the vehicle, waterproof fuse holder & fuse, eye connector to connect to battery, crimp type connector to connect cable to fuse holder and full fitting instructions. This is a smart 7 way bypass relay for modern vehicles which have MULTIPLEX / CAN Bus Wiring systems or bulb failure systems fitted. This allows you to get around the wiring on these vehicles by drawing the power from the battery to feed the trailer lights instead of the vehicles lighting system Has a built in Audible relay for indicators An Audible beep will sound when indicators are engaged when trailer/caravan is connected If bulb is out on trailer/caravan the relay will not beep