Review on NSD Power Gyroscopic Exerciser Featuring Sports & Fitness by Dave Hock

Works great! I have a purple with a digital tachometer. Great forearm workout in 3 minutes. Walk in the 4th minute and your arm is burning from the workout! Low workout glows with RED LEDs Medium workout glows with RED AND BLUE LEDs - looks purple - High workout glows with BLUE LEDs ONLY - you'll never do it in 5 minutes with that color! It tracks your RPM on the display. I know it seems very easy just to wiggle your wrist, but with the high resistance of the gyroscope you get stunning performance in just a few minutes. Once a day is good. Wonderful. Digital speed display glows orange in the dark. Batteries are never needed. An internal generator ignites electricity and tracks your speed on an easy-to-read digital display. Got it. You will never think of sending him back with the amazing workout you will get.