Portable percussion at 1.5 pounds, the GO was designed with your active lifestyle in mind. With surprising power and near-silent operation, the Hypervolt GO provides serious relief at home or on the road. Operate with Ease – Operate with Ease. Surprising Power – The ultra-lightweight GO delivers all the power you need to relax, recover, and keep going. TECH FEATURES – Brushless high-torque 40 W motor, 3 speeds – up to 3200 percussions per minute 18 V rechargeable lithium-ion battery, (2.5+ hrs of use per charge), Ultra lightweight, easy to use (1.5 lbs), TSA approved for carry-on, With a small build and lightweight design cycle through three speeds of rapid percussion without lifting a finger. Non-disruptiver – Our patented QuietGlideTM technology is fundamental to Hyperice percussion devices, and the GO is no exception.