Soundcore Anker Liberty Air 2 Wireless Earbuds, Diamond-Inspired Drivers, Bluetooth Earphones, 4 Mics, Noise Reduction, 28H Playtime, HearID, Bluetooth 5, Wireless Charging, for Calls, Home Office Incredible Sound Loved by 20 Million+ People Diamond-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. Hardly used. Excellent condition. Smoke-free home. Bundle and save!