#IB800 flame-retardant, antibacterial stretchers are placed underneath patient & hydraulically lifted inches from bed for weighing. locking casters, adjustable weighing arm, American-made steel construction. ZERO key allows you to subtract weight of bedding. 6 AA alkaline batteries (not included) or optional AC adapter. Not for transport. EMR/EHR ready. UNSPSC#42182800 800 lb x 0.2 lb / 350 kg x 0.1 kg capacity.