Tanita’s PW-630U wheelchair scale is designed to make it easy for residents to get on the scale and be stable. The durable, portable unit is equipped with wheels, allowing caregivers to bring the scale wherever elderly or wheelchair-bound residents are. Other features include body mass index, an integrated thermal printer, memory, recall and RS-232 output so data can be captured electronically. http://www.tanita.com/AcuteLongTerm.shtml