1.truck Rear system 2,Display the distance on the screen 3,alarm by ... speech 8,Display the distance on the screen truck Rear system Parameter voltage9DCV—15DCVRated voltage12DCVPower costMax 8WRespond distance0.4m—2.0mAlarm ... .2m,1.0m,9,8,7,6,5,4,stopSensor color chart: truck Rear system