Product descrtion1. The working princle of Most s the princle of ranging. When the driver is (the gear is pushed to R gear, the system starts, and the probe installed in the rear of the car emits waves to the rear of the car, and an echo signal is generated ar encountering an obstacle. Ar the controller controls and procees the echo signal, it determines the direction and distance of the obstacle.Finally, the display or sends out image and sound prompts, making it easier and safer for drivers to know when .2. Product function descrtion1. When hanging into the re gear, the system automatically enters the working state.2. 30CM-2CM centimeter-level display accuracy, accurate display of the distance of obstacles3. 7-segment LED light bars in three colors of green, yellow and red show the distance of obstacles4. Direction indication of the position of left and right obstacles5. Bi.Bi.Bi. The beep prompts the alarm step by step. The closer the distance, the more rapid the alarm sound.;6. The dual CPU responds quickly, the probe s-test function, and the abnormal status of the probe is prompted to avoid collisions cad by damage to the probe.;7. The embedded probe installation method is simple and convenient to install, and the probe color is optional.Rated working voltage: 12V DC (9.6~16V DC wide voltage operation) frequency: 40kHz±1kHz distance: 30CM~2CMAlarm volume: ≥80dBWaterproof grade 68Precision visual systemWhen , the location of the obstacle will be displayed on the ♦ Display obstacle distance♦ Mark the location of obstacles on the model car♦ Suitable for any rear view camera and Android screen