FunctionsBose Sport Earbuds are designed from the ground up to energize your exercise with acclaimed lifelike sound and a comfortably secure fit. Proprietary technologies make your music sound clear and balanced, no matter how loud you turn it up. The earbuds’ sleek design allows them to sit close to your ears. And the eartips won’t hurt your ears no matter how long you exercise and won’t fall out no matter how much you move. Get ready to beat your personal best, again and again. Instant motivation- Bose Sport Earbuds make your music sound like the performer is right there beside you, pushing you to go one more mile or do one more rep. Our patented acoustic port design and premium, high-efficiency drivers combine to deliver big sound from a small acoustic package. Our signature Volume-optimized Active EQ automatically boosts the lows and highs so that music, videos, and voices always sound balanced at any listening level. And our new StayHear® Max tips create a tight seal with your ear canal — critical for hearing the deep low notes that add impact and emotion to your music and for blocking the ambient noise around you so you can focus on your music and your workout. You move. They stay- Bose Sport Earbuds come with three sizes of StayHear Max tips, so you can find the right fit for you. Every surface that touches your ear is made of soft silicone — not hard plastic — and by applying pressure evenly across your ear, the eartips avoid putting extra pressure on the most sensitive parts. Meanwhile, the unique umbrella-shaped tip and the extended flexible wing keep your Bose Sport Earbuds securely in place — without need of an ear hook — no matter how much you shake your head or jump up and down. Built to last- Designed to resist moisture from sweat and weather, Bose Sport Earbuds go through rigorous quality testing for durability to ensure they’ll stay in top shape, just like you. They’re also rated IPX4, which means the electronics inside each earbud are protected against splashing water in case you get caught in the rain on a run. Keep talking.Keep moving- When you get a phone call while wearing Bose Sport Earbuds, instead of interrupting your workout, simply double-tap the right earbud to answer or press and hold to reject. If you answer, you’ll hear the call clearly in both ears. Meanwhile, thanks to the beamforming microphone array that separates your voice from surrounding noise, the caller will hear you clearly, too.