Contoured design Relieve tension from tired muscles with the Therabody Wave Duo Smart Back & Neck Massager. Its contoured shape is specifically designed to rest on either side of your spine or neck, making it perfect for a post-workout recovery session. The silicone wave texture adds pressure to aching muscles, giving you targeted massage therapy where you need it most. Customised vibration settings You can easily adjust the 5 powerful vibration frequencies to suit your comfort level. These help to increase your range and motion and movement, so that you're ready for your next workout.  Control via Bluetooth Connect to the Therabody app via Bluetooth to receive treatment based on your activity - there's treatments for warming up, recovery or wellness. The app gives you feedback as you use the Wave Duo, so you can make sure your treatment is as effective as possible. Over 3 hours of battery life With up to 200 minutes of battery life, you won't have to charge the Wave Duo after every use. It even comes with a protective carrying pouch, so you can safely take it with you to your gym session.