The Bodico Active Ball Duo is a portable massage tool with four modes of high-intensity vibration. The ergonomic peanut-shaped design allows for effective deep tissue self-massage and is suitable for use in warming up, relieving muscle soreness, assisting rehabilitation, and for muscle relaxation. Key Features Peanut shape design allows for deep tissue massage 4 mode vibration ball One touch control function Up to 3200 rpm power 3 hour run time, re-chargeable