Alliance Battery Powered Lift is a Hydraulic Patient Lift Feature: Six point multi-tilt spreader bar for additional stability and comfort; Only lift manufactured with lift/lower emergency backup system(battery powered lift only 1902); Interchangable battery systems feature audible low battery warning; Foot peddle base opening for wheelchair/comode access; Large easy grip handles for super maneuverability; Low 4.5" base height provides maximum stability and ensures fit under lower clearance beds; 400lb safe working load. Also available in bariatric 600lb safe working load #1904 Shipping Additional