Very good product. Perfect detection of up to 0.5 m after long beep and 0 m displayed damage. I respected them so OPEL distances> 0.4 m 2 sensors for the environment and it works very well. Only downside to fix the sensors in the holes with the forest provided. Indeed, if the bumper is thick enough there is no guard on the sensor to engage it fully, you have to press very hard. That's why I put 4 stars instead of 5.