NSD Power Lit Spinner Gyroscopic Wrist and Forearm Exerciser Featuring LED Light Computer Balanced Inner Gyroscopic Rotor  Vibration-free operation up to 15,000 RPM Small and Compact Exercise Machine  Use at school, the office and while watching TV; Provides up to 25.9 lb.-in. of torque at 10,000 RPM Easy to Use  Starts up with an included pull-string Targets Hands, Wrists and Forearms  Perfect for amateur and professional athletes and to help prevent carpal tunnel syndrome and repetitive stress injuries Enjoy a Fun, Effective Workout  Amber LEDs Light Up as You Spin