Whether you’re in the mood for calming tunes or crave some thrilling beats, the bespoke drivers of the new 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 new 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 new 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.
|Dimensions||59 x 33.8 x 42.3 mm (earbuds and charging case)|
|Weight||49g (both earbuds and charging case) 6g (single earbud) 37g (charging case)|
|Package dimensions||(L x B x H) 170 x 115 x 47 mm|
|THD, total harmonic distortion||<0,08% (1kHz / 94dB)|
|Frequency response (Microphone)||100 Hz to 10 kHz|
|Bluetooth Version||Bluetooth 5.1 compliant|
|Supported Profiles||A2DP, AVRCP, HSP, HFP|
|Frequency response||5 - 21,000 Hz|
|Ear coupling||In-ear, closed acoustics|
|Charging time||1.5 h for full charge / 10 min for 1 h playtime|
|Power supply||5 V⎓, 600 mA max USB charging via USB-C socket at charging case|
|Battery Specification||Built-in Lithium-Ion rechargeable batteries|
|Codecs||SBC, AAC, aptX™|
|Battery time||Up to 7 hrs music playtime with earbuds Up to 20 hrs music playtime with charging case|
|App support||Sennheiser Smart Control App for iOS™ and Android™|
|Speaker type||Sennheiser 7mm dynamic driver|
I feel very comfortable wearing them and it's nearly impossible to get them to fall out. I am also happy with their battery life.
But I haven't found how to know how much battery is left in the charging case. For example, when the earbuds are in low battery, I put them back in the charging case. However, I don't know when I should charge the case.
Another inconvenience is that only the right earpiece can be worn separately. This led me to use the right earphone only almost every day.
Very nice, but the Bass can be better.
Very good sound reproduction and an excellent fit
Love them!!! So incredibly happy!
Absolutely love these buds. The widest and clearest in ear headphones I've used.
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