Bose SoundSport Pulse Wireless Headphones, Power Red (With Heart Rate Monitor) About this item 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 Product information Connectivity Technology Wired Wireless Communication Technology Bluetooth Special Feature Noise Cancellation Included Components SoundSport Pulse wireless headphones^3 sizes of StayHear+ Pulse tips^USB charging cable^carry case Age Range (Description) Adult Specific Uses For Product Sports and Exercise Charging Time 2 Hours Compatible Devices Cellphones, Laptops, Tablets, Smart Speaker Control Type Noise Control Cable Feature Without Cable Item Weight 0.05 Pounds Style Earphones only Number of Items 1 Controller Type Bluetooth Battery Life 6 Hours Bluetooth Range 10 Meters Carrying Case Battery Charging Time 2 Hours Earpiece Shape Rounded tip UPC 017817735322 Manufacturer Bose Corporation Product Dimensions 1.13 x 1 x 1.13 inches Item Weight 0.8 ounces Item model number 762518-0010 Batteries 1 Lithium Polymer batteries required. (included)