Trigger Point MB Vibe Sports Medicine : The Trigger Point MB Vibe(TM) features vibrating massage technology to help speed up the muscle recovery process. This massage ball comes in a compact size and is easy to roll in any direction, allowing you to pinpoint tender muscles and approach them from multiple angles. A three-speed vibration helps deliver a targeted massage experience for faster relief and recovery. Benefits Unit offers a premium massage. Features 3 vibration frequencies. Rechargeable; AC charger included. Rechargeable battery can last up to two hours. Measures 4 inches and weighs 1.65 pounds.