Electroic Auto Car Parking r Re Backup with Alarm No No Hole Car Feature:*100% and High Quality*Material:Plastic*Automatically beeps to alert near-by objects*Detects people, vehicles, small & high kerbs, garage doors, ars, posts, walls, fences, barriers, sks, etc*Improves parking safety*Minimizeper damage*Indicates object distance with different beeping frequencies*Easy and concealed "insideper" installationInstallation:To safety test the U301,the vehicle's engine MUST BE OFF and the parking brake must be ened.*Turn the vehicle's ignition key to the ON position,but do not start the engine.*P the vehicle's nsmiion in re gear.*Stand about 6 feet away from theper and slowly approach the vehicle.*At distance from 27.5 to 15.75 inches,you will hear a fast beep.At distance from 15.75 to 8.0 inches, you will hear a continuous beep.*Note:per does not need to be removed.No holes need to be ed.Frequently Asked Questions:(1)Q:Will the Back-up r prevent me from hitting any object behind my car?A:No.The Back-up r is only a warning device.If you baa car too fast ,or your reaction time is slow,you could still strike an object.(2)Q:Does the weather affect the sensitivity of the Back-up r?A:Yes.Rain can reduce the range slightly.Package included:1 x Electroic Re 1 x Alarm Beeper1 x r 1 x Set of tool1 x English InstructionsNote:1.The real color of the item may be slightly different from the tures shown on website caused by many factors such as brightne of your monitor and light brightne.2.Please allow slight manual measurement deviation for the data.