Key features

• •Product Includes: JIN BD Blue Gyro Ball （No Light）, a finger skateboard clip, a gift box, a storage bag, a wrist strap, and a brand card (scan the QR code to access tutorials and after-sales service).
• •Start-up Method: The upgraded automatic start spring design eliminates the need for a pull cord. Simply press with both thumbs and push forward (8–10 times), then release. As the wrist rotates, the rotor quickly generates centrifugal force, providing resistance to your wrist and forearm for an efficient workout. Easy to start anytime.
• •Suitable for assisting: Long-term use of computers or mobile phones, carpal tunnel syndrome and repetitive stress injuries are common. By continuously and indirectly strengthening the muscles and flexibility of the forearm and wrist, it will significantly improve muscle strength, flexibility and promote vascular circulation.
• •Chic gift: Contains a gyro ball and a delicate finger skateboard, it is a great gift for children who love sports, middle-aged people who are restless and people who work in offices for a long time, guitarists, pianists and other musicians
• •Health Benefits: Arm Strength Ball improves blood circulation and strengthens fingers, wrists, hands, forearms, biceps, triceps, ligaments and shoulders
• •Quality Assurance: JIN BD torque ball has been tested by factory machines, warehouse inspection and manual re-inspection. The product does not require battery power. The wrist rotation interacts with the inner ball core to generate centrifugal force to maintain efficient rotation. The faster the speed, the greater the force generated.