The CanDo Magneciser vertical 3 in 1 rotation / supination exerciser with height adjustable wall mount offers ultra-quiet magnetic, bi-directional resistance. Adjustable height allows for sitting, standing, or wheelchair access. Unit comes with 3 attachments: for the wrist, shoulder and elbow. Each unit comes with a fully automatic 5-function digital LCD display; speed, elapsed time, calories, distance and scan of all functions. Resistance is controlled by turning the resistance knob. Units use 2 AA batteries (included).