Master & Slave Relay Kit x4 + XBB PowerUnit & Dongle

This kit combines the XBB OBD-II dongle and PowerUnit with the Master and Slave relay kit X4, so you can control up to four extra lights, LED bars, work lights or reversing lights wirelessly through the OBD port.

Smart control through OBD-II

The XBB dongle reads the car’s signals in the OBD port and sends them wirelessly to the PowerUnit relay, which switches the lights. There is no need to tap into the high beam wiring, which makes it ideal for modern cars with CAN bus. You set it up in the XBB app. It works on 12 and 24 V, and one dongle can control up to four PowerUnits.

Why Master and Slave

The XBB PowerUnit relay handles extra lights up to 15 A on its own. Many LED bars and driving lights draw far more. The Master and Slave kit adds a heavy-duty 80 A slave relay, controlled by the PowerUnit, so you can run powerful lights through XBB without fitting a separate relay kit.