Sennheiser CX 400BT True Wireless In-Ear Bluetooth Headphones

Everyday life may be different every day, but the superior voice should always be the same. Produced with Sennheiser's leading audio technologies, the new CX 400BT True Wireless headphones put you in full control of an extraordinary sound experience.

Using the same sound technologies as the MOMENTUM True Wireless 2, Sennheiser's flagship headset, the CX 400BT offers you a perfect option with its long-lasting battery life and comfortable structure suitable for all-day use.

Whether you crave soothing melodies or exciting beats, the dynamic drivers of the new CX 400BT True Wireless deliver high-quality sound with deep bass, natural mids and clear, detailed treble. You can also personalize your listening experience using the built-in equalizer options to enjoy incredible sound quality tailored just for you.

Whether you're using iOS or Android, you'll always enjoy the exceptional sound quality of the new CX 400BT True Wireless headphones. With support for a wide range of audio codecs including SBC, AAC and aptX, premium sound is guaranteed on every mobile device.

Don't miss a thing during the day with 7 hours of battery life on a single charge and 13 hours with the small, stylish and compact charging case, 20 hours in total. The new CX 400BT True Wireless headphones are designed to ensure you get premium sound wherever you go.

The new CX 400BT True Wireless is made for people who have a long playlist, can't stop listening to audiobooks, can't get out of a loving phone call, or are simply hooked on doing anything you can think of about audio. Available in black and white colors, it has an ergonomic design created for comfortable use all day long.

The Sennheiser Smart Control app provides a transparent mode setting and a built-in equalizer setting window. You can customize the touch controls as you wish and easily switch between connected devices. With software updates, you won't be deprived of improvements and you can easily fix unwanted problems.

CX 400BT vs. True Wireless 2

– CX 400BT True Wireless Headphones

– Silicone Ear Tip (XS, S, M, L)

– Charging box

– USB Type-C Cable

- User guide

• Dimensions
59 x 33.8 x 42.3 mm (earphones and charging case)• Weight
49g (earphones and charging case) 6g (single earbud) 37g (charging case) Case dimensions
(L x W x H) 170 x 115 x 47 mm
• THD, total harmonic distortion
<0.08% (1kHz / 94dB)


USB Standard
USB-C
• Guarantee
2 years
• Frequency Range (Microphone)100 Hz – 10 kHz
• Bluetooth Version
Bluetooth 5.1 • Supported Profiles
A2DP, AVRCP, HSP, HFP
• Frequency range (Speaker)

5 – 21,000 Hz
• Ear grip type
In-ear, closed acoustic
• Charging time
1.5 hours full charge / 10 minutes charge 1
hours of use
• Battery Type Built-in replaceable lithium-ion battery
• Codecs
SBC, AAC, aptX™
• Charging time
7 hours headphones + 20 hours charging box
• Application Support
Sennheiser Smart Control App for iOS™ and Android™
• Drive Type

Sennheiser 7mm dynamic driver