Auto Starting Wrist Strength Gyro Ball Hand Exerciser Forearm Exerciser for Exercise Joint and Muscle Auto Starting Strength

Auto Starting Wrist Strength Gyro Ball Hand Exerciser Forearm Exerciser for Exercise Joint and Muscle Auto Starting Strength

• Adopts advanced gyro structure. The faster it rotates, the great resistance
• Silicone wrap handle provide comfortable, nonslip grip, complementing hand rotation movements
• The wrist power gyro ball automatically starts and displays rotation speed, and force applied, time, and calories burn
• Light weight and easy to carry, can used at any time home, in office or on the road
• Features a clear blue backlight for easy of your training result