Sennheiser CX 400BT True Wireless In-Ear Headphones (Black)

Rules are there to be broken: With the new CX 400BT True Wireless, Sennheiser has rewritten the rulebook for true wireless audio by bringing high-end acoustic technology to an exciting new range of everyday earphones. With intuitive customizable controls and all-day comfort and battery life, they are the ideal, uncompromised choice for people that are passionate about great sound.
The CX 400BT True Wireless deliver astonishing performance thanks to Sennheiser’s acclaimed 7mm dynamic drivers. Developed for the audio specialist’s premium true wireless earphones, this bespoke acoustic system delivers high-fidelity stereo sound with deep bass, natural mids and clear, detailed treble. Whether bringing vocals to life or stepping up the intensity of the bass, the built-in equalizer and Sennheiser Smart Control app make it possible to shape the sound to feel every emotion.

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Product description


  • 7mm dynamic driver delivering superior sound quality
  • Up to 7 hours play back time with up to 20 hours available with on the go charging via the case
  • Customisable touch controls

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