Auto-Start Powerball: The ultimate wrist and forearm strengthening tool that helps improve grip strength, dexterity, and coordination. Easy to Use: Simply start the gyro ball by winding up the internal spring, and use your wrist motions to keep it going. Multi-Functional: This wrist power gyroscope ball can also be used as a hand grip strengthener and a finger exerciser for musicians, athletes, and office workers. LED Lights: The colorful lights inside the ball light up as you spin it, making it a fun and entertaining tool to use during workouts. Portable and Compact: This super gyro power ball is small enough to take with you anywhere, making it a great addition to your fitness routine. Auto-Start Technology: Our Fitness Planner Auto-Start Powerball is a wrist power gyro ball that starts up with a simple flick of your wrist – no cords or strings necessary! Multi-Functional: This wrist power gyroscope ball can also be used as a hand grip strengthener and a finger exerciser for musicians, athletes, and office workers. LED Lights: The colorful lights inside the ball light up as you spin it, making it a fun and entertaining tool to use during workouts. Auto-Start Powerball: The ultimate wrist and forearm strengthening tool that helps improve grip strength, dexterity, and coordination. Portable and Compact: This super gyro power ball is small enough to take with you anywhere, making it a great addition to your fitness routine.