老快三
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AR819香港希玛AR-819泊车距离警示器 5米距离黄灯提示√三种颜色led停车提示√停车声音提示√5米距离绿灯提示√0.5米距离红灯及警报提示√不同灯对应不同声单提示√超声频率38.5~50kHz开机自检功能√低电显示√
