·Digital display indicating distance between car and obstacles.        
·2-side, 3-color digital indicator
·3-stage beeping mode indicating different distance
·2/4/6/8 sensors system optional
·Human voice alarm optional
·Anti-freezing, rainy-proof design, work well under extreme cold weather                                                                     
·Working voltage: DC12V +/- 2V      
·Beeper: 70-90dB
·Working temperature: -40~+80°C
·Frequency: 40KHz
·Detection distance: 0.4-2m
·Alarm distance: 0.3-0.6m
·Best detection distance: 0.4-1.5m