PRODUCT OVERVIEWEnjoy the crisp, powerful sound of these Anker Soundcore Liberty Air 2 headphones. The four microphones ensure clear sound pickup while making calls for seamless communication, and the rechargeable battery offers up to 7 hours of use when fully charged. These water-resistant Anker SoundCore Liberty Air 2 earphones have five pairs of different-size eartips for customizable comfort, while the included charging case holds three 7-hour charges for all-day playtime.KEY FEATURESIncredible Sound Loved by 20 Million+ PeopleDiamond-Inspired Sound: Inspired by the ultra-hard structure of diamonds, Liberty Air 2’s driver domes maintain their rigidity even when vibrating at high frequencies. Music is reproduced with a 15% larger frequency bandwidth for clear treble and 2× more bass.Perfect for Home Offices: Each earbud is equipped with two microphones and cVc 8.0 noise reduction technology. Environmental noises are reduced by 60%, while 95% of your voice is retained so you sound louder and clearer on the other end.Up to 28 Hours of Playtime*: A single charge gives you a full 7 hours of listening, while the charging case extends it to 28 hours of playtime. And when the case needs a power boost, simply set it down on a wireless charger.HearID Technology: Take the test to create a custom set of EQ settings that are optimized for your ears. HearID maps your hearing sensitivity at multiple frequencies and intelligently analyzes the results to give you a truly personalized listening experience.