This was one of the first two sets to feature a 9V battery box and electric light & sound bricks. The other one being 6480 Hook and Ladder Truck. Both vehicles shared the same design.
The truck came with two barriers and two 2x2 tiles with traffic signs. These accessories could not be stored inside the truck despite its relatively large size, because the battery box accounted for the bulk of the vehicle's structure. Instead, they could be attached to clips at the truck's sides.