This chair scale is light & easy to move on four castors, two of which are braked. Hinged, foldaway armrests make patient transfer easier & integral footrests make it more comfortable for the user. The chair is capable of measuring both weight & body mass index, & has a hold of weight function. The seat is hygienic & easy to clean. Power is supplied via mains electricity or a rechargeable battery. Capacity is 230kg (36st) in 100g (1/4lb) increments, with an automatic 35kg (51/2st) fine weight range with increments of 50g (1/8lb). Class III approved. Weight 24kg.