First - remove the bumper:

Car without bumper

Fitted the self adhesive strip on the inside:

I connected the control unit right under the rear light and fed the cable to the bumper by creating another hole in the metal which is protected by the rear light in this car (painted the hole as well).
Only two wires needed to connect: Earth and 1 wire to the reverse light.
The beeper I fixed next to the parcel shelf.
How does it work? When you select reverse, the unit beeps twice to let you know it is functioning and active.
When there is an object within 60 cm of the car, wherever the strip is attached, it will beep and starts to beep faster when you get closer. Once within 15 cm, it is a continuous beep.
For £30, extreme good value I would say and very easy to install.

