All articulating SleepSafe Bed models, both manual and electric, are designed for the head section and the knee section to smoothly move up and down. The angle of each section can be set at a preferred angle. The HEAD section moves from the flat position (zero) to 70 degrees. The KNEE section moves from a flat position (zero) to 40 degrees. For further information, contact our offices toll-free at 866.852.2337.