The serial audit unit from a well-known manufacturer HAS has a number of high technical characteristics. It establishes the connection between the ML65X and CAN-BUS and is responsible for a number of other important functions, such as calling a car, display output, overweight and normal weight outputs, direction arrow outputs, and a car lamp output. By production of this model the most advanced technologies calculated on the best European standards were used. The material of the revision unit is durable and resistant to various mechanical damages. The device regulates the automatic opening and closing of the door.