Gyroball wrist exercise ball, automatic start, 5 resistance levels, light control, gyroscopic forearm trainer, arm strengthening, arm, finger, wrist (transparent casing)

SMART START & 5 STAGE MAGNETIC RESISTANCE SYSTEM - Ready to use with pressure start function, no pulley required. Continuously adjustable for beginners to professional athletes.
LED LIGHT CONTROL - Color change indicates resistance level and workout progress.
HOLISTIC HAND WORKOUT - Strengthens finger muscles, wrist bones, and forearms simultaneously.
Rehabilitation and Prophylaxis - Prevents tendonitis and supports injury recovery.
Safety Wristband and carrying bag - Includes adjustable wrist strap to prevent accidental falls and protect against injury. Convenient storage bag for hygienic transport in a backpack or gym bag.