brand new and high quality Features: The reversing sensor is designed based on the principle that bats fly at high speed in the night without colliding with any obstacles. The probe is mounted on the rear bumper.The item has4 probes. The probe radiates at a 45-degree angle and searches for up and down. Its biggest advantage is that it can explore obstacles that are lower than the bumper and the driver is difficult to see from the rear window, and alarm, such as flower beds, children playing in the back of the car. When the gear lever is engaged in the reverse gear, the reversing sensor automatically starts working, and the ranging range is 0.3 to 2.5 meters, so it is very practical for the driver when parking. Specification: Type: Car parking sensor Material: Plastic Quantity: 1set Color: Black Rate Voltage: 12V for DC Rate Current: 100mA - 300mA Detecting Distance: 0.3-2.5m Ultrasonic Frequency: 40KHz Control Box Working Temperature: -20 - 70 celcius LED Display Size: 10x2.6x2.2cm / 0.32808399x0.0853018374x0.0721784778 inch Package Included:1*Main Control Box;1*LED Display Indicator;4*Parking Sensors with 2.5m Line;1*22mm saw drill for head;1*Power Cable;2*Double Side Sticker(other accessories demo in the picture is not included.) Notes:Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you did. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!