Digital Tube Car Parking Sensor System(LH-811) Hot sale product, good quality, cheap price ... 12 months warranty Digital Tube Car Parking Sensor System(LH-811) Hot sale product, good quality, cheap price12 ... sound2.Three colors(green, yellow,red)7-segment LED lights prompted obstacle distance3. 30~150cm, centimeter-level prompts accuracy ... probes Digital Tube Car Parking Sensor System(LH-811)