ACAA 2.0: Our exclusive coaxial dual driver technology delivers high and low frequency sound directly to your ear without interference. Its wide soundstage is detailed and spacious, bass has a deep punch, mids are luscious, and treble sparkles. Personalized Noise Cancelling: Standard noise cancelling only adjusts noise based on data. HearID ANC analyzes your ears and level of in-ear pressure to create a tailored profile that optimizes noise reduction and reduces external sound to suit your ears. Fusion Comfort Fit: Liberty 3 Pros earbuds have a triple-point ergonomic shape and built-in ear pressure relief for all-day comfort. 4 sizes of liquid silicone ear tips and flexible ear wings ensure you get a strong seal and secure grip. Up to 32 Hours of Playtime: Enjoy up to 8 hours of music from a single charge, plus get 3 full charges from the compact charging case to extend the playtime even further. Recharge the case via USB-C cable or wireless charger.