Improve muscle elasticity and roll out sore muscles more effectively with the power of vibration. The GoFit Go Vibe Accu-Massager's technology combines the benefits of targeted self-massage with vibrating motion. This combination stimulates muscle blood-flow and offers an added dimension to muscle relaxation and flexibility. Product Features Muscle-energizing vibration Soothe sore muscles anytime Stimulate muscle blood-flow Includes 2 deep tissue massage attachments: Stainless steel dome and "five-fingered" nodule massager Operates on 2 standard AAA batteries Durable plastic outer gripping surface Ultra-portable hand-held size Pairs with GoFit's Roll-On Massager, Polar Roll-On Massager and Thermal Roll-On Massager Dimensions: 3.25" x Height: 3"