This innovative self-starting wrist ball is designed to strengthen your fingers, wrists, and forearms through gyroscopic resistance training. The Avenn Gyro Ball features an ergonomic design that fits comfortably in your palm, making it suitable for fitness enthusiasts, office workers, rehabilitation patients, and anyone looking to relieve stress. The device operates on a simple principle: as the speed increases from 6000 r/m to 20000 r/m, the resistance also increases proportionally from 7.8kg to 61kg, allowing you to customise your workout intensity. Starting the gyro ball is effortless - simply press the core with both hands and push it in the direction of the arrow until the resistance builds and the core cannot roll, then quickly release and grasp the ball with your palm to control the rotation. This versatile training tool is perfect for building grip strength, improving wrist flexibility, aiding in rehabilitation exercises, or simply as a stress-relieving fidget device during long work hours. The compact and portable design means you can take your workout anywhere, whether at the gym, office, or home. The transparent casing allows you to watch the mesmerising gyroscopic motion as you train, providing visual feedback on your performance.