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- NSD Power Essential Spinner Gyroscopic Wrist and Forearm Exerciser
Product Description
- Patented Design; Compatible With Nsd Digital Speedometer Sm-01 and Sm-02 (battery-free version)
- Computer balanced inner gyroscopic rotor for VIBRATION FREE operation at up to 15,000 RPM
- Worry-free to drop; Impact Resistant structure with Military-grade plastic shell that comes in an attractive color: Amber, Blue, Green
- Reversible inner tracks make 2X Lifespan
- Simple to start with a pull-string (included), see video for tips and tricks