PEAK Garage Parking Sensor - brand new in package - $20 firm PACKAGE INCLUDES: - LED parking signal - proximity sensor with cable - four AA batteries - three mounting screws THREE SIMPLE STEPS TO SAFER PARKING - Simply position the signal at the windshield level on the garage wall. Position the sensor at bumper height on the garage wall - Move your car into your ideal parking position - Push the "LEARN" button so the system memorizes where you park CHANGES COLOR AS YOU GET CLOSER TO THE SENSOR Green light: 4-8 ft Yellow light: 2-4 ft Red light: 0-2 ft