Used daily by the world's most elite athletes, the VYPER VG1 is a cutting-edge fitness and recovery device that uses pressure and vibration to improve the body's overall physical performance. With three speeds of high-intensity vibration, the VYPER VG1 allows you to warm up, activate, and recover faster and more effectively than any other SMR tool. Rechargeable lithium-ion battery with over two hours of use per two hour charge.