Semi-Electric Single Crank Hi/ Lo Bed, 2-Piece Frame/ Spring (5310IVC)Motorized knee and head section adjustment with four position pendant control. Hi lo crank is permanently attached at foot end of bed for height adjustment; crank folds away for storage. Drive shaft controls height of bed and installs with two quick connections. No messy cables to connect or store. Head end height 37 5 8, foot end height 35 7 8. Overall length 88, bed width 36. 80 spring. Mattress not included.