It is car parking or reversing the safety of assistive devices, ultrasonic sensors (commonly known as the probe), the controller and display (or buzzer), and other components.

• 它是汽车泊车或者倒车时的安全辅助装置，由超声波传感器（俗称探头）、控制器和显示器（或蜂鸣器）等部分组成。