Train smarter.In any weather. 3 interchangeable ear-tip covers for a perfect in-ear fit Three sizes of interchangeable rubber ear-tip covers create a perfect seal. 6 hours play time when monitoring Run faster. Jump higher. Kick harder. You get 6 hours play time-even when monitoring your heart rate. A single charge takes 2 hours. Built-in mic with echo cancellation for clear audio No more of those annoying echoes when you are talking on the phone. With our acoustic echo cancellation, you always get a clear, undisturbed connection. Heart-rate monitor built in. Train smarter Track your heart rate with the built-in monitor. A sensor in the earbud tracks your heartbeat with precision. You'll know when to push it and when to rest, so you get the best possible results from every workout. Compatible with open fitness-tracking apps such as Strava and Runkeeper. IPX5 waterproof. Waterproof and sweat-proof These sports headphones boast an IPX5 soak-proof rating, which means they're resistant to sustained soaking. Sweat hard, train in the rain, or even wear them in the shower. Quick Charge. Charge for 15 minutes, train an extra hour A single charge takes 2 hours. If you need an extra boost, just 15 minutes Quick Charge gives you another hour of play time. Smart pairing. Automatically find your Bluetooth device The user friendly buttons let you pause your playlist, take calls, and adjust volume. All without touching your smartphone. The headphones are ready to pair the instant you switch on Bluetooth. Once they're paired, they remember the last device they were paired with. Soft rubberized wing tips. Secure and comfortable es of interchangeable rubber ear-tip covers create a perfect seal. Flexible wing tips fit securely under the ridge of your ear. No matter how hard you go, these sports headphones stay where you need them. User friendly button control User friendly button makes it easy for kids to take a call, skip a track, or pause what they're listening to. All without touching their smartphone. Volume buttons on the base of the ear cup are easy to reach, as is the LED light button. Detailed sound. Good sound. Great passive noise isolation. Plug into a world of crystal clear and natural sound with precisely tuned 6mm drivers. Your Sports headphone is carefully engineered to deliver crisp and richly detailed yet natural sound-whatever the music you are listening to.