Dynaflex Arm Shaper Arm sculpting and toning fitness device with 4 pounds of resistance Built-in gyro mechanism generates results comparable to weight lifting Tones and strengthens forearms, biceps, triceps, wrists, and hands Produces fast, visible results on first Use, Compatible with dynaflex docking station Gyro runs at 13, rpm, includes Starter cord and training cd Arm sculpting and toning fitness device with 40 pounds of resistance Built-in gyro mechanism generates results comparable to weight lifting Tones and strengthens forearms, biceps, triceps, wrists, and hands Produces fast, visible results on first use; compatible with Dynaflex docking station Gyro runs at 13,000 rpm; includes starter cord and training CD