DINOKA Wrist Trainer LED Wrist Ball Powerball Gyroscopic Ball - Arm Strengthener, Wrist & Forearms Exerciser (Blue with Counter) Father's Day Gift

【Good for Health】

* 1) The more exciting part, this exercise ball lights up when it's spinning! And the LED light is not powered by batteries but your spin. It's battery free. No need to worry about power running out!!
* 2) 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.
* 3) 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.
* 4) Highly recommend to anyone, so on your 5 minute break take it out to relax . You will be impressed on what this device can do for you. It works on your grip, forearm, and blood flow you will be amazed.
* 5) The force ball can generate between 1 and 30 lbs of resistance by spinning at almost 10,000 RPMS.

【 How to Start it】

* 1) Pull off the plastic insulation before use,press the buttom ON/CLR.( Digital Counter).
* 2) Insert the red string( Included) into the hole, wind it up, and pull straight down, fast enough to have the gyroscope turn the LED on.
* 3) Turn your hand facing down, and slowly start to rotate,you will feel that it is scratching against the inside of the wrist ball.
* 4) Keep rotating your wrist and the gyroscope will spin faster, develop a higher pitch sound. Once you feel it spinning fast enough, stop your hand , you could feel it oscillating right in your palm. If the counter doesn't work, please check the battery plate, and re-install it.

【Package】
1x Force ball with LED
1x Starting Cord
1x Hand Strap
1x User Manual