Bose SoundSport Pulse Wireless Headphones

Built in heart rate sensor makes it easy to track your performance. Connectivity Technology: Wireless Bluetooth and NFC pairing so you can connect to your devices wirelessly StayHear and Pulse tips provide a secure and stable fit for your most intense workouts ; Sound sport pulse wireless headphones do not employ noise reduction technology; To ensure an accurate reading, the sensor window (located on the left earbud) should be in contact with the skin; If the sensor stops providing a heart rate measurement, try adjusting the left earbud and verifying bluetooth connection to your device; If that doesn't restore function, wipe the sensor window with a damp cloth The Bose Connect app gives you real time heart rate readings, and continually adds more functionality to your headphones;If the sensor stops providing a heart rate measurement, try adjusting the left earbud and verifying Bluetooth connection to the device; If that doesn't restore function, wipe the sensor window with a damp cloth Works with popular fitness apps like MapMyRun, RunKeeper, Endomondo and Runtastic. Wireless range up to 30 feet; 5 hours of wireless power from the rechargeable lithium ion battery