Ergonomically contoured to the back, spine, and neck, this portable smart vibrating roller is a uniquely versatile rolling solution. Five powerful vibration frequencies and high-traction wave grooves work to deliver just the right angles of pressure to areas in need—releasing soreness, reducing tension, and improving movement. Curves around spine to safely target muscles 5 customisable vibration frequencies Innovative wave texture for max traction Smart device with Bluetooth® connectivity 200-minute battery life Quiet with noise dampening silicone Protecting the spine and backThe Wave Duo\'s contoured shape comfortably applies pressure to the peaks and valleys of the back muscles on either side of the spine.Neck and upper bodySitting on...