Features: 1. Automatically detect obstacles behind the car when reversing, automatically turn on and switch. 2. Crescent-shaped LED heartbeat display function step by step, digital + sound prompts step by step. 3. Microcomputer intelligent control, accurate digital display of obstacle distance, derived from military technology, accurate and reliable. 4. Sound + LED high-brightness distance prompt is not affected by the environment, especially in rainy days and nights. 5. Anti-electromagnetic interference, patented technology, international certification, quality assurance, have no impact on the original electronic system. 6. The probe adopts embedded installation, multi-color configuration is optional, the sensor is exquisite and compact, and it is easy to install. When the reverse gear is engaged, the system automatically enters the detection working state: 30CM~200CM, centimeter-level display accuracy, accurately display the distance of obstacles; 5-segment LED light bar in three colors of green, yellow and red indicates the distance of obstacles: left and right obstacle position and orientation indication; Bi.Bi.Bi. beeps to alarm step by step, the closer the distance, the faster the alarm sound; The dual CPU responds quickly, the probe self-checking function, and the probe abnormal state prompts to avoid the reverse collision caused by the probe damage. Fashionable high-quality imitation cowhide grain ultra-small LED digital display, in line with the style of the car dashboard, easy to install; embedded The probe installation method is simple and convenient to install, and the probe color is optional.