Power Wrist Ball Metal Gyro Ball AUTO Start Wrist Exercises Force Ball Gyroscope Ball Wrist and Forearm Exerciser Arm Strengthener for Stronger Muscle and Bones

How to Start it
1. Pull off the plastic insulation before use.
2. Toggle the ball along the double direction arrow to the max resistance,then release it,fast enough to have the ball turn the LED on.
3. Turn your plam facing down, and slowly start to rotate, you will feel that it is scratching against the inside of the wrist ball.
4. Keep rotating with wrist then the ball will spin faster, develop a higher pitch sound. Once you feel it spinning fast enough, stop your rotate, you could feel it oscillating right in your palm.

What is Gyro ball?
Gyro ball/Force ball/magic balls get model sport now.If you don’t know how to play it,can search video via youtube
It is fun and good for hands,wrist,shoulder, forearms,biceps and good as warm-up sport before you do climbing,golf,basketball etc
Also if you use computer or play the piano for long time,you can play this ball every day for 15~20 minutes.You will feel you hand won’t be so pain.
It is a very interesting toys to make your forearm sore and gets the blood going.
For Medial Epicondylitis, Prevent Tendonitis and improve Grip Strength, Relieve Pain From Tennis Elbow, Golfers Elbow, and Tendinitis, Medium, Intermediate.
Power ball Wrist Ball Toys Hand Grip Strengthener ;Hand Grip Exerciser;Relieve Stress —Anti Stress Anti anxiety for EDC, ADHD, Children, Teens, Student and Adults.
DO not drop the ball on hard surface at any time,the heavy rotor will damage.
DO not touch the ball rotor when it is spinning at high speeds,it will burn.
Not suitable for children under 10 years old whose hand strength insufficient to use the product
Do not add any oil or moothy liquid into it which may cause it inoperation

Heavyweight ZINC rotor provides 50 lbs torque at 10,000 RPM. Ideal for building muscle and grip strength for professional and amateur athletes alike.
Pump, hypertrophy, rehab, prehab and wrist/grip strength all in one: They’re great for rehab and prehab regarding wrist, grip and forearms, so all grip trainers should have one on standby
Small, compact exercise machine you can take ANYWHERE
Pure mechanical wrist ball, no batteries or powersource, environmentally friendly without electromagnetic radiation, military-grade plastic shell to protect your spinner gyro ball toy.
AUTO START, NO STRING NEEDED! with internal pre-tensioner, incredible high speed up to 20,000 rotational speed per minute pass through testing