[Headphones on, World off] upgraded hybrid active noise cancelling (ANC) technology protects your ears from excessive noise and quells airplane cabin sounds, city traffic or a busy office to help you focus on what you want to hear - your music, movies and videos.^ [Unrivaled stereo sound & pure audio power] the upgraded hi-fi stereo sound benefits from the 45mm neodymium driver, CSR chip and delivers deep and powerful bass for an all-round impressive HD sound quality.^ [ Sleek, Ultralight design] the soft protein cushions emulate human skin texture; Ultralight and ergonomically designed earmuffs for a comfortable wearing experience. Adjustable headband,axis for comfy all-day wear note: Please take off the headphone every 1-2hrs for a few minutes to relax your ears.^ [Hassle-free calls] built-in noise cancelling microphone for crystal-clear calls, Bluetooth for uninterrupted connections and excellent audio transmission. You can enjoy wireless or wired mode depend on your require.^ [Rapid charge & go] Enjoy an impressive 20-30 hour playtime on a 1 hour charge; the 5 minute high-speed charge & go gives you more than 2 hours of playtime; note: remember to turn off the ANC when taking off the headphones to avoid battery drainage.