Indicates how close your car is to a garage wall other objects to prevent damage to your vehicle property set the safety distance to 1 2 or 3ft 30 60 or 90cm away from wall indicator lights will change color depending on how close you are to that distance green light car is in detection zone orange light car is within the slow down zone distance limit red light car is at safety limit in stop zone easy to use set up offers parking assistance for vehicles which may not be