Product Description Battery free Powerball 250Hz Classic Blue is simple to start using the included cord. Simply insert the tip of the cord into the small hole in the rotor, wind it around the rotor fully until there is about 3cm of cord remaining – then pull. One quick tug and the Powerball rotor will instantly jump to life in your hand. Each Powerball 250Hz Classic comes with two starting cords. Includes: 1 x Powerball 250Hz Classic 2 x Starting Cords Free strength & rehabilitation videos on the manufacturers website Powerball 250Hz Classic Blue For Effective Strengthening & Rehabilitation Powerball 250Hz Classic Blue is one of the most effective gyroscopic hand exercisers in the world and will build substantial strength in the entire arm from fingertip to shoulder. Certified to spin at speeds in excess of 16,000rpm, 250 Hz Powerball produces up to 15kg of resistance and is the ultimate piece of wrist exercise equipment – spin slow for gentle rehabilitation, or spin fast for a forearm workout of monumental proportions in less than 60 seconds. Cord Activated Spin speeds of up to 16,000rpm Military-grade polycarbonate shell For strengthening & rehabilitation Battery free Build Strength from Fingertip to Shoulder Exercise with Powerball is purely isometric so it will complement any training regime. Powerball exercises the arm in a way that simply isn’t possible with regular isotonic (free-weight) exercise training and it engages a much higher percentage of muscle fibres in a far shorter time frame. If you are looking to improve wrist, grip and arm strength, Powerball will give you the edge. For Sportspeople and Musicians For all sportspeople that rely on strong wrists and grip strength, there is nothing on the planet that builds it faster – Powerball helps develop muscle power & endurance quickly and efficiently, allowing you to train harder, cycle further and climb higher. What’s more, Powerball helps increase agility, speed, accuracy and endurance, making it the ideal device for any practicing musician. Effective Injury Rehabilitation Powerball’s non-impact isometric resistance makes it a highly-effective tool for injury rehabilitation and prevention. Spin Powerball at slow speeds for as little as 3 minutes a day to experience instant pain relief and fast, effective treatment for injuries such as RSI, carpal tunnel syndrome, tendinitis, muscle tears and broken or fractured bones. 250Hz Classic Blue 250Hz Pro Blue 250Hz Supernova Classic 250Hz Supernova Pro Cord Start ✓ ✓ ✓ ✓ Starburst LED Lights ✓ ✓ Battery LCD Speed Meter (optional) ✓ (optional) ✓ Force Rating @ 10,000 RPM 10.8Kg 10.8kg 10.8kg 10.8kg Rehabilitation ✓ ✓ ✓ ✓ Sport and Fitness ✓ ✓ ✓ ✓ Shell Material Polycarbonate Polycarbonate Polycarbonate Polycarbonate Weight 248g 256g 248g 256g RRP 14.99 21.99 13.99 19.99