Earbud-free wear leaves the inner ear open without uncomfortable vibrations.Comes with a detachable neckband for additional stability so that they don’t fall off during intense workout sessions.360° open-space audio with head tracking support, so you can feel like you’re at a concert. 16.2mm large driver, for clear and crisp sound, and rich bass. Dual microphone ENC call noise reduction technology for clearer calls. Up to 12 hours playtime, a speedy 10-minute charge gives you up to 4 hours of listening.