MAXSOINS New Force Ball Power Gyro Wrist Multicolor Ball Arm Exercise Ball Spinner Gyroscopic Wrist and Forearm Exerciser,White Light, With Tachometer, White Globe. LED Lights up brightly as you spin it in White Lights,With a tachometer. White Globe. Computer balanced inner gyroscopic rotor for VIBRATION FREE operation at up to 15,000 RPM Impact Resistant structure with Military-grade plastic shell; Simple to start with a pull-string (included) Small, compact exercise machine you can take ANYWHERE; Provides up to 25.9 pound-in of torque at 10,000 RPM Performance Digital LCD counter displays various vital workout information, including Historical top speed; Certified for entry into our Monthly Top Speed Contest;