Makes your heart beat. Tracks your heartbeat. The music powers your workout. And powerful technology tracks it so you can push even further, with no wires in the way. These sport headphones feature a built-in heart rate sensor and StayHear+ Pulse tips to give you the information and stability you need to take your workout to the next level. Engineered to elevate your workout You put your heart into your workout. Your gear should be up for the challenge. A built-in heart rate sensor from PerformTek tracks your performance with high accuracy directly from your ear, so you can rely on these headphones to do more than power your workout. Optimize your intensity without missing a beat of your music, and focus on the real challenge: digging deeper. Stay tangle-free A quick, wireless connection gets you moving faster. Pairing to your Bluetooth device is easy with voice prompts, or if you have an NFC-enabled device just tap your phone to the inline remote. And you’ll get up to five hours of wireless power from the rechargeable lithium-ion battery. Inline mic There’s no need to interrupt your workout. Want the music louder or have to take a call? An inline mic/remote lets you answer/end calls, play/pause tracks and adjust volume-without reaching for your phone. The app takes you further The Bose Connect app displays accurate heart rate readings in real time from your SoundSport Pulse wireless headphones, so tracking your performance is easy. You can personalize settings to make them all yours, and it’s easier than ever to pair, switch and control your devices. See how a simple, intuitive app can make all the difference. The Pulse technology also works with popular fitness apps like MapMyRun, Runkeeper, Endomondo, Runtastic and more. Unmatched combination of comfort and stability When you move, you want earbuds that stay put. Our StayHear+ Pulse tips deliver stability during your most intense workouts. Their redesigned shape stays comfortable and creates a gentle seal inThis Certified Refurbished product is tested and certified by the manufacturer or by a third-party refurbisher to look and work like new, with limited to no signs of wear. The refurbishing process includes functionality testing, inspection, reconditioning and repackaging. The product ships with all relevant accessories, a minimum 90-day warranty, and may arrive in a generic white or brown box.