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The 250 Hz Pro, including RPM Counter is the most popular of all the Powerballs. In an striking Blue colour its ideal for strengthening and high scores.You set this rotor in motion using a cord or your finger and build its speed by subtle rotation of the wrist. It contains no motor or no batteries. All of the energy which we describe below comes from you dear reader and the stronger you are, the faster you will be able to make your NSD Powerball spin! ...and the faster you spin the inner rotor the more inertia it generates and the more resistance it subsequently inflicts upon the fingers, hands, wrists, arms and shoulders.These unique instruments generate massive force and put the shoulders, arms and wrists of the user under big pressure making them ideal for fitness enthusiasts and virtually every kind of sport imaginable. And in addition, because the inertia or gyroscope resistance generated within the NSD Powerball is directly proportional to the speed at which you are spinning the rotor these precision instruments are just as capable of gently rehabilitating a damaged limb wrist breakage, carpal tunnel syndrome, RSI, tendonitis, tennis elbow, golf elbow etc. as they are at building huge muscle in the arms and shoulders its a completely non impact form of exercise and is all about rotor speed.In a world of cheap imitation products, NSD Powerball sits at the very top of the marketplace with its superlative 250Hz movement a creamy, silky, yet hard hitting spin that no other gyro can match!The best imitation products can reach speeds of between 6000rpm to around 9000rpm before the vibrations coming from the unbalanced rotor inside make it uncomfortable and impossible to spin any faster. At the heart of your new NSD Powerball however there beats a rotor that has been so precisely balanced using advanced computerised technology that it can reach speeds in excess of 15,000rpm without even the slightest vibration at which point it is generating a staggering 40lbs of inertial resistance and hitting your arm and wrist a workout of monumental proportions!The ingenious RPM clock sits neatly at the top of the ball and accurately counts the number of revolutions performed by the rotor in a given run, helping you to monitor the improvements in your body strength on a daily basis.The little digital counter built into the ball is furiously addictive and theyll keep on trying and trying and trying until their arms are ready to fall off but still wont be happy because each will know that he should have been able to wring just those extra 40rpm out of the ball that would have put them back on top again!...Put a shiny new NSD Powerball down on a table in front of a group of guys girls are just as bad! and we absolutely guarantee that a battle will commence between them to find out just who can achieve the highest score with the ball. So whether you decide to purchase NSD Powe
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