The Daily-Weigh Scale, model SR255, is a digital hydraulic lift scale designed for use by individuals with mobility or severe physical disabilities or spinal cord injury. The scale has a wheeled base, a hydraulic lifting mechanism, and a tray on which the person to be weighed lies. Weight readings are displayed in pounds or kilograms on a 16-character liquid crystal digital display (LCD). The unit also has auto power shut down. POWER: Uses six D cell alkaline batteries and is equipped with a low battery indicator. DIMENSIONS: The base clearance is 6.75 inches. CAPACITY: 400 pounds. WARRANTY: Two year limited warranty.