JBL Reflect Fit Heart Rate wireless sports headphones with JBL Signature Sound are designed to help you train in the zone. With its heart monitor technology, compatible with most Heart Rate enabled fitness apps, you can stream the pulse readings directly to your phone for data analysis and receive real-time updates through the headphones with just a single touch. The secure fit ergonomics design adapts to your movement for a distraction-free wearing experience. This, combined with its sweat-proof construction, makes the JBL Reflect Fit the perfect workout companion. The Reflect Fit is not only great for workouts, it's also the perfect partner for any moment of your active lifestyle: thanks to the extended 10-hour battery life and integrated microphone with vibration call alert, you will never miss a beat or a call. JBL Signature Sound For over 70 years, JBL has engineered the precise, naturally articulated sound found in high-end cinemas, arenas and recording studios around the world. That legendary JBL sound is now available anywhere personal audio travels. Live Heart Rate feedback Get instant Heart Rate read-outs without touching your phone or device. Hands-free calls + Vibration Alerts Never miss a call thanks to Call Vibration Alerts, the headphones vibrate to alert you of an incoming call.