ITEM NAME:Electromagnetic Auto Car Sensor Parking Reversing Reverse Backup Radar Sensor AU.Electromagnetic sensor. Electromagnetic field changes as object get closer to the bumper. Size: Main Module: 5.8 x 3.4 x 1.8 cm Alarm Horn: Approx 4.8 x 3 x 1.6 cm. Improves parking safety. 1x Alarm Horn.
