12V Electromagnetic Car Parking Sensor Kit Universal Sensors Buzzer Reverse Backup Radar Sound Alert Indicator Probe System Feature: *100% Brand New and High Quality *Material:Plastic *Automatically beeps to alert near-by object *Detects people, vehicles, small & high kerbs, garage doors, pillars, posts, walls, fences, barriers, skips, etc *Improves parking safety *Minimize bumper damage *Indicates object distance with different beeping frequencie *Easy and concealed "inside bumper" installation Installation: To safety test the U301,the vehicle's engine MUST BE OFF and the parking brake must be engaged. *Turn the vehicle's ignition key to the ON position,but do not start the engine. *Place the vehicle's transmiion in reverse gear. *Stand about 6 feet away from the bumper 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:Bumper does not need to be removed.No holes need to be drilled. Frequently Asked Questions: (1)Q:Will the Back-up Sensor prevent me from hitting any object behind my car? A:No.The Back-up Sensor is only a warning device.If you back a 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 Sensor? A:Yes.Rain can reduce the detection range slightly. Package included: 1 x Electromagnetic Reverse Radar 1 x Alarm Beeper 1 x Sensor Antenna 1 x Set of tool 1 x English Instruction