Take the Powerball in your hand, set the rotor in motion with the cord provided or use your finger when you get used to it and it will slowly gain speed as you keep shaking. No batteries, no motor, just pure gyroscopic power in the palm of your hand. A serious toy it is!

How forceful can it get? You may ask… If your hands & arms are strong enough to hold it long enough, the rotor will reach an unbelievable 15,000 RPM! At which point it’s exerting about 18 kg (40lbs) of tremendous pressure on your limbs and travelling at approximately 250 revs per second.

You can keep track of your personal speed record on the digital counter. The world record is currently 16,317RPM.

The manufacturer rightly claims that this device can help in rehabilitation of Carpal Tunnel Syndrome, Arthritis, Repetitive Strain Injury and similar illness related to joints and arm muscles. It’s also used by athletes to develop physical strength and endurance.