Easy to install: Unscrew the bumper, made four holes in the bumper using the provided hole saw (check the location on the internet already equipped vehicles). The sensors are clipped into the holes, cables run inside the bumper and back through the body (on my vehicle, there is a passage under the rear lights). The more complicated is to find the son 2 corresponding to reversing light box on which your branch (still on the internet, you will definitely find an explanation fits your vehicle) but not insurmountable! The sound box swerves around 2m. My van, sometimes in the middle of the cargo space, I did not partition and the noise level is enough! Ask in 1h. Lights up when you place the reverse: one beep indicates that the case is active then the pens more or less reconciled tell you the remaining distance to the obstacle. It would be a shame to miss. With my extended van, I have no worries for parking around town!