In the Box Wave Duo Protective carrying pouch USB-A to USB-C cable Scientifically Calibrated Shape The Wave Duo is specially, scientifically contoured with absolutely precision. The rollers two high points efficiently target either side of the spine and neck, while the concave centre avoids extra stress being placed on the spine. 5 Vibration Settings The foam roller has 5 powerful vibration frequencies which can be adjusted to your comfort personal comfort levels. These vibrations can help release soreness, reduce tension, increase your range of motion, and improve movement in general. Smart Connectivity The Wave Duo connects to Therabody app, via Bluetooth® connectivity, which allows you to take control of your rolling experience. You can use the app to adjust vibration intensity and discover guided Wave Series recovery routines specifically tailored to your needs. Innovative Wave Texture The exterior of the roller is designed with an innovative wave grooves that adds additional dimensions of pressure to the muscle while also providing superior traction control. Specifications Dimensions: 7in (17.9cm) x 3.9in (10cm) x 2.6in (6.6cm) Weight: 2.0lbs (0.9kg) Material: Textured silicone outer Battery Life: 200 minutes