功能说明：                                                                                                                                                                                                                                                                  三级BiBi声报警（可选真人语音）                                                                                                                                                                                                                                          后视镜显示，安装于后视镜的位置上指示                                                                                                                                                                                                              四探头没车后障碍物                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          技术参数：
额定工作电压：12V
工作电压范围：10.5V～16V  DC
额定工作电流：20mA～200mA
探测距离：0.3～2.0m    
主机工作温度：-30～+70℃