The Dynaflex Amber Powerball Gyro with Glowing Amber Lights strengthens wrists, forearms, and other lower arm muscles. The powerball is used as a carpal tunnel exercise (for prevention and rehabilitation) and also for improving arm strength for most sports and physical activities.
By activating the gyro, a dynamism (motion) is created, which activates LED lights, located in the interior of the gyro. The faster the unit runs, the brighter the lights, until a user's whole hand is engulfed in a bright glow.
DIMENSIONS: 0.75 inches diameter x 2.75 inches length.
WEIGHT: 34 grams.
WARRANTY/GUARANTEE: As stated by the manufacturer.