SUPERIOR SOUND QUALITY: The combination of powerful 40mm large-aperture drivers and advanced CSR8635 chip deliver rich, refined acoustics that compliment the bass experience, and the memory protein earmuffs with a noise isolating seal block out distractions and exterior noise letting you immerse totally in music LONG LASTING COMFORTABLE FIT: Adjustable headband, 90° swiveling ear cups, super soft protein earpads ensure the most comfort fit you could ever experienced, our new lightweight cushion material features magnetic absorption, which helps improve comfort and sound quality over long periods of time HANDS-FREE CALL & BUILT-IN MIC: With a high-quality built-in microphone, it provides a clear phone communication(microphone only works in the Bluetooth mode). Skip a track, change the volume and take or make calls just by a headphone, with no need to reach to your phones, Bluetooth connection distance is up to 33ft

Latest Wireless Bluetooth 4.1 Technology with A2DP stereo music, clear sound, ideal for high quality music while running, jogging, cycling, skating, etc Built-in rechargeable Lithium battery lasts up to 4.5 hours of talk / play time or 175 hours standby Sweat-proof, light weight and ergonomic design to enhance your comfort; comes with interchangeable earbuds and ear hooks