Immerse yourself in amazing sound quality thanks to Sennheiser’s unique 7mm dynamic audio drivers and personalize your audio experience with the built-in equalizer and the Sennheiser Smart Control app.

Manage your music, make calls or trigger the voice assistant with customizable touch-sensitive technology built into both earbuds.

Enjoy outstanding sound quality no matter your mobile device with our wide range of audio codec support including AAC, aptX and SBC.

Experience non-stop play time with a 20 hours of battery life - 7 hours on a single charge and a further 13 hours via the charging case.

Dive into your favorite music for as long as you like with an ergonomic design made for all-day wearing.

Better sound. Better control.

Whether you’re in the mood for calming tunes or crave some thrilling beats, the bespoke drivers of the CX 400BT True Wireless  deliver high-fidelity sound with deep bass, natural mids and a clear, detailed treble. Plus, you can personalize your listening experience with built-in equalizers to enjoy amazing sound quality that’s tailored to you.

Tune in. Switch off.

For those who always like to be on the ball, on the beat, and on-call, the customizable touch controls on both earbuds make it easy to enjoy a smarter and more connected life. The touch-sensitive interfaces provide fast access to voice assistants such as Siri and Google Assistant, as well as intuitive control of your music and calls.

Premium sound. Any device.

No matter where you stand – iOS or Android – you’ll always get to enjoy the outstanding sound quality of the CX 400BT True Wireless earbuds. Thanks to our wide range of audio codec support including SBC, AAC and aptX, premium sound is guaranteed with any mobile device.

Anytime. All the time.

Never miss a beat throughout the day with 20 hours of battery life – 7 hours on a single charge and a further 13 hours with the small, sleek and compact charging case. The new CX 400BT True Wireless earbuds are designed to ensure you get premium sound wherever you go.

Minimalist Design. Stylish comfort.

The CX 400BT True Wireless is made for those who enjoy diving into a long playlist, a lively audiobook or a loving phone call. Available in black and white, they have an ergonomic design created for all-day comfortable wearing.