KYTO Wrist Power Device Electronic Wrist Power Ball Strength Ring Centrifugal Ball Timing Measurement Speed Trainer

1. Size: about 210x210x60 mm
2. Weight: about 627 grams
3. Exercise parts: arm strength/wrist strength/chest muscles/back muscles
4. Power supply: AG12 button battery
5. Can display exercise duration, exercise strength, real-time speed
6. The principle of centrifugal force, when the greater the speed, the greater the inertia generated, the greater the force control is required to drive the body muscles to move
7. The curved handle fits the wrist, and it can be held firmly even with strong vibration