The Pulseroll 4 Speed Vibrating Peanut Ball is a great self-use massage tool which uses vibration technology to reduce muscle pain and overall discomfort. It is best suited for myofascial release, trigger point therapy and deep tissue massage. It's unique peanut shape fits perfectly around the targeted muscle. The lightweight and portable design makes it travel friendly and the perfect flight companion. A Pulseroll vibrating peanut ball can be used on almost any part of the body, but works wonders on the glutes and calves specifically. It is also really great to use under the feet to work through the arches. Coming with 4 vibrating speeds, making it ideal for warming up and cooling down as well as other workout types. Also coming with a rechargeable battery - To charge the battery fully, the charging time will take approximately 3 hours. When fully charged it can last up to 6 hours (dependent on power level setting). The remote control allows easy adjustment of the vibration speed.