The Canbus listener enables monitoring of the car's Canbus system for various signals. The inductive Canbus listener allows connection of Canbus interfaces for extra lights without modifying the car's original wiring. The listener is clamped around the car's high beam signal cable. It detects when the desired signal is present and activates an output on the compatible Canbus interface. This, in turn, provides a 12V signal that triggers a relay. The Canbus listener is designed to be used with our Canbus interfaces and easily connects to the interface's connection socket. High beam interface: 16-600911 Reverse signal interface: 16-600913