The CX True Wireless lets you enjoy superior crystal-clear sound, excellent battery life, and effortless ease of use for an outstanding everyday audio experience. Enjoy Sennheiser’s signature sound with our 7mm dynamic drivers for 9 hours of playback time, 18 hours battery life via on-the-go charging. Experience excellent passive noise cancellation provided by the secure fitting ergonomic design. Control on the go is effortless thanks to intuitive touch controls for audio, calls, and voice assistant access, while Bass Boost and the built-in EQ let you tailor the sound experience to your taste.