此程序是无线发射与接收，也是汽车电子上的到速雷达，利用四路传声波传感器接受信号经高频无线发射，放在驾驶室里的接受装置，能够反映车后面的情况。并能够在液晶屏清晰显示在身的地点。-this procedure is wireless transmitter and receiver, as well as automotive electronics to speed on the radar, Four-use acoustic sensors for high frequency radio signal fired, the cab Lane on the receiving device, to reflect the circumstances behind the car. And the LCD screen can be shown clearly in their own locations.