Theragun Wave Duo Smart Vibration RollerCurved for your back, neck, and spine. Ergonomically designed to provide comfortable treatment for the back, spine and neck, this portable smart vibrating roller is a uniquely versatile rolling solution. Five powerful vibration frequencies and innovative wave texture work to deliver just the right angles of pressure to areas in need releasing soreness, reducing tension, and improving movement. From shape to material to added vibration, the Wave Duo is