Inside Bumper Electromagnetic Sensor Kit
Instead of drilling holes in your bumper to be warned of obstacles when backing up, this kit has an electromagnetic sensor (uses Electromagnetic Waves as opposed to Ultrasound Waves).
It is totally concealed by sticking the strip sensor on the inner surface of the bumper. The installation does not change appearance of the bumper while provides total protection to the back of the vehicle without any blind spots close the bumper.
The system is automatically activated when reverse gear is engaged. An Electromagnetic field is generated by the strip sensor around the bumper. When an obstacle enters this field, the electromagnetic field suffers a perturbation that changes in relation to the distance of the obstacle. The perturbation is detected at a distance about 80cm away from the bumper and is transformed into an acoustic signal that increases in frequency as the obstacle moves closer.