Resbo Metal Core Silver Gyro Ball, Auto Start Wrist Ball Hand Strengthener Wrist Exerciser;

Brand: RESBO
Product Type: Wrist Trainer
Color: White
Material: Zinc Alloy, ABS, PC
Inner Ball Material: Metal
Start Type: Rope Pulling
Product Weight: 9.6OZ Product Size: Diameter 2.85Inches(Max), Height about 2.37Inches

Usage
*1. To start, hold the ball in your hand with the exposed gyroscope facing left, insert the included red string into the hole, wind it up, and pull straight down, fast enough to have the gyroscope turn the LED on.
*2. Then turn your hand facing down, and slowly start to rotate. The gyroscope will start to "bite" and you will feel like it is scratching against the inside of the wrist ball.
*3. To keep rotating your wrist and the gyroscope will spin faster and develop a higher pitch sound. Once you have it spinning fast enough, you can stop your hand and feel it oscillating right in your palm.

Notice
*1. Not suitable for children under 10 years old whose hand strength insufficient to use the product
*2. Do hot drop it from high or hit it on hard objects, it may cause serious damage
*3. Do not touch the inner ball while it in high-speed running
*4. Do not add any oil or moothy liquid into it which may cause it inoperation

Package Content
1x Wrist Ball
2x Starting Rope