Specification: Gear: 5 Power:45W Speed: 3000/min Material: ABS Plastic Battery Capacity: 1500mAh Number Of Massage Heads: 4 pcs Size: Approx. 22 x 18 x 6cm Effects: Reduced recovery time, Increased blood-flow, Clears lactic acid, Releases muscle knots, Breaks down scar tissue, Increased ranges of motion. Features: LED digital display. Ergonomic silicone grip, can minimize the external force. 4 gear speed regulation, touch screen. Vibration principle hammering style, strong power to massage muscles. High frequency vibration, dissipation of fatigue, deep massage, relaxation of muscles, alleviate pain. 4 kinds of massage head, provide comfortable massage experience while reducing the damage to bones and collaterals. The device allows the user to directly target areas of soreness and reduce pain, whilst also reducing recovery time, making it an essential product for any athlete. Perfect for warming up, soreness relief, injured muscles, muscle pain and activation, tightness relief; increase to higher speeds for larger and stronger muscle groups. USB Rechargeable, convenient and easy to use.