10-641 is a power relay to be used when installing a camera into a vehicle.
Sometimes a reverse power feed from a reverse light may not be strong enough to power a camera or may create interference.
This relay can use a weak reverse trigger to switch on a better 12v power feed for a camera.
Adapter harness to add a reverse camera to an original Volkswagen radio screen.
This harness has a built in interface to give ignition power and a reverse feed to the camera.
Note, camera input function needs to be activated with VCDS.