The CanDo Magneciser Table-Top Shoulder, Arm and Wrist Exerciser is an upper body pedal exerciser ideal for increasing muscle strength, improving range-of-motion, developing coordination and enhancing circulation. The exerciser, which is bi-directional, uses magnetic resistance to enable smooth and quiet operation. The arm length can be adjusted from 13" to 22" to adjust the arc of the shoulder wheel. Progress is easily tracked with the 5-function digital display. This device indicates the speed, time exercised, calories burned, the distance traveled and ?scan', which rotates through all the functions. The resistance knob lets you change pedal resistance for progressive exercises. Forward and backward movements don't just make this peddler versatile, it allows users to double the exercises and benefits as compared to a one-directional peddler. The ergonomic hand grip provides extra comfort and security. The device uses 2 included 'AA' batteries. The base of the unit features non-skid, molded feet for extra stability. The heavy-duty design and multi-functionality make this exerciser ideal for busy clinics.