3 In 1 Radar Parking Sensor Kit Visible Parktronic LED Display System Backup Monitor Reversing Camera Alarm Reversing radar Product selling point, advantage: powerful function, with reversing image, and radar alarm function, and radar data and image are displayed on the display at the same time. It can be used with car monitors, car navigation, and large-screen navigation. The installation is simple, no need to drill holes like traditional radar, and the same installation method as ordinary cameras, you can install it yourself. Product parameters: Working voltage: DC12V 2V Working current: 90Ma Maximum power consumption: 1W Maximum detection distance: 2 meters Minimum detection distance: 0.3 meters Pixel: 720*504, Minimum illumination: 0.5LUX Standard system: NTSC Lens angle: 170 degrees Alarm volume: 85-105dB Working temperature: -20~+60 The working principle of the reversing radar: most of the reversing radars use the ultrasonic ranging principle. After the echo signal, the controller controls and processes the echo signal to determine the direction and distance of the obstacle. Finally, the display or buzzer sends out image and sound prompts, so that the driver can know what to do when reversing, making it easier and safer.