1, the wrist ball is a manual power device, purely mechanical, no battery and power supply, no electromagnetic radiation, the rotation of the wrist drives the core to rotate at high speed, thus generating a powerful force.
2, the speed change light is brightly colored by you, the speed of the wrist ball passes through the core of the core, these lights will become bright and colorful, and feel the colorful rhythm, thus increasing the fitness fun.
3, the special wristband is safe, please use a special wristband to make it strong, pull out and keep it safe.
4, mechanical power does not require power, the rotation of the wrist interacts with the internal rotation of the ball, generating centrifugal force, keeping the ball running at high speed.
5, can effectively alleviate the pain and muscle strain caused by long-term use of wrists and arms, such as tenosynovitis, arthritis and so on. It also helps fitness enthusiasts perform targeted strength training.
Roduct Name: Finger Trainer
Origin: Made in China
Color: purple, blue, red, yellow
Housing material: PC
Size: 7.5 * 7.5 * 6.0 cm
Weight: 497 grams
Uses: exercise the wrist, exercise the muscles of the arm, exercise the strength of the finger, exercise the flexibility and strength of the finger, exercise the speed of the finger, coordinate the finger
Kaiyitong Finger Trainer Exercise Finger Flexible Wrist Centrifugal Ball Men And Women Exercise Wrist Strength Trainer Black - B07YT9Z1WT