Reversing radar,The radar emits ultrasonic waves, which are reflected back when encountering obstacles, and alert the driver through sound, light bars, numbers, etc. The working principle is just like the flight of a bat Distinguishing the distance of obstacles in front of and behind the vehicle is an essential function of radar integrated machine When the car brakes forward, it start when it detects an obstacle. It is a practical and user-friendly design Intelligently distinguish eight directions It is easy to see where the obstacles are Model:NY2020 Detection distance behind the vehicle: 0.~2.0M Working voltage: 9V~15V Working temperature: -30℃~80℃ Detection angle: HGreater than 80° VGreater than 70° Front detection distance: 0.~0.8M Working current: 200MA+50MA Ultrasonic frequency: 40KHZ The product appearance and printed words depending on the batch, but this does not affect use Color: Black Material: plastic Package Contents: 1 x monitor 8 x Reverse Sensors Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.