The CanDo® Magneciser™ table top exerciser offers extremely quiet, bi-directional resistance so you can exercise the muscles and joints in the shoulder, arm, wrist, and upper body. The arm on the Magneciser™ is adjustable from 13" to 22", and features a padded handle. Each Magneciser™ comes with a fully automatic, 5-function LCD display that keeps track of speed, elapsed time, calories burned, distance, and scan of all functions. Also, you can adjust the resistance level to make workouts easier or harder to your own personal preference. Uses 2 AA batteries, which are included.