Unlike many companies that produce truly wireless headphones, Audio-Technica places an emphasis on sound quality, not just convenience. The ATH-CKS50TW earphones are no exception. Featuring specially designed 9 mm drivers, these earbuds deliver clear, full-range audio with deep, powerful bass – low frequency is enhanced by acoustic ducts on the back of the drivers. Newly developed 9 mm drivers deliver clear, full-range audio with the punch of enhanced bass Best-in-class battery life with up to 20 hours of continuous playback on a full charge (and up to 90 minutes of use from a 10-minute quick charge) Multipoint pairing function allows you to stay connected to two Bluetooth devices at once Buttons in the earbuds provide easy control of music playback, volume, calls, and hear-through and noise-cancelling functions Low latency mode improves synchronicity between audio and video for smooth streaming and gaming Hybrid eartip structure combines hard and soft silicone material to provide a secure, comfortable fit with superior sound performance Selectable hear-through function lets in ambient sounds so you can remain aware of your surroundings A-T Connect app gives you additional control: activate low latency mode, adjust and save EQ to the headphones, change L/R volume balance, locate misplaced headphones, change codecs, and more Flexible dual- or single-ear usability Automatic power-on when removed from the case Google Fast Pair lets you quickly pair headphones with an Android smartphone or other device Qualcomm® cVc™ Generation 8.0 ensures excellent call quality Sidetone circuitry improves conversations by letting you hear your voice in the headphones when making calls on most smartphones Compatible with high-quality Qualcomm® aptX™ Adaptive audio, Qualcomm® aptX™ audio, and AAC codecs Compatible with Sony’s 360 Reality Audio for a truly immersive sound experience Rain and water splashproof design (IPX4*-equivalent)