LED Wrist Ball Trainer Gyroscope Bal Relax Muscle Power Gyro Arm Hand ExerciserBoost Your Strength Anywhere! Elevate your fitness routine with the Wrist Ball Trainer, the ultimate portable workout for strength, grip, and flexibility. This innovative hand and arm exerciser brings high intensity training right to your fingertips. The faster you spin, the greater the resistance, reaching up to an impressive 60kg of force. Compact and lightweight, its designed to give you a powerful workout wherever you goat home, in the office, or