Parking sensor with learning function 1. Automatically identify spare tyre or tow-bar without false warning, remember it as part of the vehicle 2. With waterproof connector , easy installation and replacement of sensors 3.compatible with any cars 4.LED direction indicator of left, middle and right 5.4 sensors available in various colors and size for customer to select 6.simulative in four colors 7.waterproof sensors work well under severe weather and temperature condition 8.Four installation options: hang up or plastered with 3M glu in the front or rear , and the display will antomatic convert image, it also can mirror image by "Mirror" switch 9.high sensitivity 10.BiBi alarm sound, volume adjustable(high, low, off) 11.Rated voltage: 12V DC 12.Operating range: 9-16V 13.Working temperature: -30 +80°C 14.Ultrasonic frequency: 40kHz 15.Detective range: 0.2 2.5m 16..Size: 141mm*56mm*26mm Current Price9 U.S.DMin order quantity2000setsTotal supply20000set/setsDelivery Date18daysValidity2011Voltage12VPer carton20 setsModelPW-226-4