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.- Semi-Electric Single Crank Hi/ Lo Bed, 2-Piece Frame/ Spring Mfr. Direct