NSD Power Winners Lit Spinner Gyroscopic Wrist and Forearm Exerciser Featuring Digital LCD Counter and LED Light LED Lights up brightly as you spin it in Amber Performance Digital LCD counter displays various vital workout information, including historical top speed; Certified for entry into our Monthly Top Speed Contest; See our Facebook page for more information 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