DescriptionSensor tape paper shell and stick for vehicles with metal bumpers.Electromagnetic field changes as object closer to the bumper. Automatically. To alert near-by objects.Detects people small vehicles and curbs garage doors pillars walls walls Hurricane Barriers Salta.Improves parking safety. Minimize bumper damage. Indicates object distance with different.Easy inside bumper installation. LED alarm display horn.Specification:Name: electromagnetic sensor.Material: plastic.Wires to "reverse lamp" (12 volts DC).Size: main module: 5.8 * 3.4 * 1.7cm in length: 52 cm.Horn alarm: approx. 7 * 2.5 * 2.5cm Cable length: 400 cm.Color: black.Installation:A safety proof U302 the vehicle engine must be and the parking brake must be engaged1.The vehicle to the ignition key in position, but not the engine.2. Place the transmiion vehicle in reverse gear.3. Support 6 feet away from the bumpers and slowly approach the vehicle.4. In the distance of 27.5 to 15.75 inches, you will hear a rapid beep in the distance of 15.75 to 8.0 inches that you hear a continuous beep.Note:There might be a bit color distortions due to different computer resolutions.There might be size errors due to different computer resolutions.Package include:1 * electromagnetic sensor recoil.1 * alarm horn.1 * Antenna sensor.1 * tool set.1 * instructions in English.