The Sennheiser CX 400BT truly wireless in-ear headphones deliver exceptional sound quality and comfort in a sleek, compact design. Equipped with Bluetooth 5.1 technology, these earbuds offer seamless connectivity, long-lasting battery life, and an intuitive touch control system. Perfect for music lovers and professionals alike, the CX 400BT provides clear calls, immersive sound, and a customizable fit.

From the manufacturer

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 treble. Plus, you can personalize your listening experience with the Smart Control App, which lets you play with built-in equalizers for an even more amazing sound quality.

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 lifestyle. 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 CX 400BT True Wireless earbuds. Thanks to our wide range of audio codec support including SBC, AAC and aptX, premium sound is guaranteed and with any mobile device.

Anytime. All the time.

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

Minimalist Design. Stylish comfort.

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

Key Features:

• Premium Sound Quality: Powered by Sennheiser’s high-quality drivers for rich, balanced sound with deep bass and clear treble.
• Bluetooth 5.1: Ensures stable, low-latency wireless connection with your devices.
• Touch Controls: Easily control music, calls, and voice assistants with simple touch gestures.
• Long Battery Life: Up to 7 hours of playback on a single charge, with an additional 13 hours from the charging case.
• Customizable Fit: Multiple ear tip sizes for a secure and comfortable fit.
• Built-in Microphone: Crystal-clear call quality with a high-quality microphone for hands-free conversations.
• IPX4 Rating: Sweat and water-resistant, perfect for workouts and outdoor use.
• Voice Assistant Integration: Compatible with voice assistants like Siri and Google Assistant for added convenience.
• Compact Charging Case: A sleek, portable case to keep your earbuds safe and fully charged on the go.

With superior sound, comfort, and functionality, the Sennheiser CX 400BT offers an exceptional audio experience for everyday listening, calls, and more.

Technical Details