Bed and desk system in one piece of furniture. Desk remains parallel to the floor when lowering so items on top will not fall off. Space saving-ideal for use as guest bed/home office, on boats and recreational vehicles. Uses a standard twin size mattress 75" x 39" with a maximum thickness of 10" and approximate weight of 44 lbs. Items left on desk cannot exceed 18" in height and 25 lbs.