r rrrrrrr状态rr距离rr区位状态rr报警声音rr数字显示rrr1rr2.5M—1.6Mrr预警状态rr无声rr1.6—2.5rrr2rr1.5M—1.0Mrr慢行状态rrBi...Bi...Birr1.0—1.5rrr3rr0.9M—0.5Mrr警戒状态rrBi.Bi.Birr0.5—0.9rrr4rr0.4M—0.0Mrr限行状态rrBi......rr0.0r r技术参数:r额定电压:12Vr工作电压:10-14V DCr最大功率:3.6Wr发音:83dBr超声波频率:40K HZr工作温度:-400 C ~ +800 Cr报警距离:0.3M~2.5M"};