The Semi-Electric Extra Long Hospital Bed is a motorized adjustable bed designed for use by individuals who need to elevate the head of the bed. This bed features a 312-coil innerspring mattress, an epoxy-coated steel frame, a headboard and a footboard, and four ball-bearing casters (two locking). The head of the bed adjusts from flat to a sitting position and the knee area flexes for comfort using the remote control. The bed height is adjustable using the hand crank at the foot of the bed.. CONTROLS: The four-position hand-held remote control. POWER: Uses standard household alternating current (AC). DIMENSIONS (WxLxD): The mattress is 35 x 80 x 6 inches and the frame is 36 x 88 inches. The bed height adjusts from 21 to 29 inches. WEIGHT: 215 pounds. WARRANTY: Included.