Digital Chair Scale, Capacity 550 lb x 0.2 lb (250kg x 0.1kg), 1" Tall LCD Display & Controls, EMR Ready, BMI Calculator Function, Flip-Up Armrest, Hinged Footrests, USB & RS-232 Output, 6-AA Batteries (Not Included), Power Coated Steel, Heavy Duty ABS Plastic, Seat Dimension 21"W x 18"H, 2-Year Warranty (DROP SHIP ONLY)