1.truck reverse aid system 2,Display the distance on the screen 3,alarm by ... English speech 4,two way video in truck reverse aid systemWe are a manufacturer which is specializing in parking ... speech 8,Display the distance on the screen truck reverse aid system Parameter voltage9DCV—15DCVRated voltage12DCVPower costMax 8WRespond distance0.4m—2.0mAlarm ... 0m,9,8,7,6,5,4,stop truck reverse aid system