This is a truck manufactured by Action Signs and Billboards Inc. www.ActionSignsAndBillboards.com. The signs we put on the truck rotate to display 3 different ads. Because there are 4 signs you get a total of 12 different ad spaces. The back sign is also a door that opens up so you can store things inside the truck. There are T-5 lights that run along the top of each sign so the signs can be lit at night.