NSD Digital LCD Counter SM-03

Keeps Track of Your Progress — Tracks your progress, speed and strength with the NSD Power Spinner with an easy-to-read digital LCD display with amber backlight Product Feature(s): Smart Display — Shows four different statistics, including current total revolutions, speed in RPM, historical top speed in RPM and physical strength index Easy to Use — Equipped with a handy auto-power function that turns it on at 3,000 RPM for easy tracking; Features battery-free design that generates power itself Simple Installation — Easy to install on your NSD Spinner; Works with Essential, Fluorescent, AutoStart and Metallic Series Spinners by NSD Patented Design — Designed and manufactured by NSD for the original NSD Spinner only; Beware cheap knock-offs and imitations