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Sennheiser CX 400BT In-Ear Truly Wireless Headphones - Black

Model Number: CX400TW1 Black
Web Code: 14930273

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Overview

Sculpted with form and function, these Sennheiser CX 400BT truly wireless headphones are perfect for listening to music on the go. Its Bluetooth 5.1 connectivity and 20 hours of playtime provide wireless freedom to enjoy your favourite tracks and podcasts in impressive sound detail. Voice assistant support for Siri and Google Assistant makes hands-free calling effortless.
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Overview

Sculpted with form and function, these Sennheiser CX 400BT truly wireless headphones are perfect for listening to music on the go. Its Bluetooth 5.1 connectivity and 20 hours of playtime provide wireless freedom to enjoy your favourite tracks and podcasts in impressive sound detail. Voice assistant support for Siri and Google Assistant makes hands-free calling effortless.
  • Durable in-ear headphones fit precisely into your ears and save you the hassle of dealing with cords so you can work out with complete freedom
  • Bluetooth 5.1 lets you pair your compatible devices within a 10m range for lossless signal transmission for a variety of audio codecs including SBC, AAC, and aptX
  • Bluetooth device management feature allows for easy switching between connected audio sources
  • 7mm dynamic drivers produce powerful, crystal-clear sound for an immersive listening experience
  • Built-in equalizer lets you customise the sound to your personal preference
  • Intuitive, customisable touch controls allow you to play/pause the music, adjust volume levels, and provide easy access to Google Assistant and Apple Siri voice assistants
  • Integrated microphone lets you answer and make clear, natural-sounding, hands-free calls
  • Rechargeable battery offers up to 7 hours of continuous playtime, plus you can enjoy up to 13 additional hours with the portable charging case (for a total of 20 hours)
  • Comes with 4 sizes of ear adapters, allowing you to choose an optimal, comfortable fit for your ears
Headphone Style
In-Ear/Ear Bud
Primary Headset Usage
Music Playing
Band Style
None
Sports & Fitness Ear Clip
No
Sound Isolating
Yes
Noise Cancelling Type
Passive Noise Cancelling
Noise Cancelling
No
Echo Reduction
Yes
Truly Wireless
Yes
Wireless
Yes
Bluetooth
Bluetooth 5.1
Bluetooth
Yes
RF Wireless
No
NFC Ready
No
Wireless Talk Time
20 h
Charge Time
1.5 h
Effective Wireless Range
10 m
Designed For Gaming
No
Designed for Sports
No
Designed for Kids
No
DJ Style
No
Professional Grade
No
Water/Sweat Resistant
No
Inline Volume Control
No
iPod/iPhone Control
No
Built-in Mic
Yes
Android Control
No
Voice Assistant Built-In
Siri
Works with Google Assistant
Yes
Fitness Tracking
No
Heart Rate Monitor
No
Folding
No
Step Tracking
No
Cord Length
Not Applicable
Plug Material
Not Applicable
Plug Size
Not Applicable
Plug Shape
Not Applicable
Driver Unit Size
7 mm
Frequency Response
5 Hz - 21 kHz
Impedance
Not Applicable
Sensitivity
107 dB
Colour
Black
Colour Family
Black
Weight
49 g
  • CX 400BT True Wireless Earbuds
  • Charging Case
  • USB-C Charging Cable
  • Silicone Ear Adapter Sets (XS/S/M/L)

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Rating Breakdown

5

45

4

22

3

4

2

1

1

2

Reviewer Recommendation

91%

Of the 74 reviewers who responded, 67 would recommend this product.

Key Considerations

Averages based on how reviewers feel this product performs.

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  • Excellent Quality earbuds
    Reviewed by Ca - January 10, 2021

    I am very happy with this. It is a snug fit and the sound quality is what you come to expect from Sennheiser. Doesn't have all the bells and whistles like the others, but it really isn't necessary. I got this boxing day sale. I did accidently drop the left ear bud into the sink with running water as I was washing my face and accidently knocked it out. It took a direct hit from the running water and i quickly picked it up and wrapped a towel around it. This isn't water resistant so I was worried i ruined it within the first week. To my surprise, no damage and works perfectly fine. I will refrain from wearing it next time I wash my face.

    Yes, I would recommend this to a friend.

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  • Perfect Sound Quality!
    Reviewed by billy41539 - October 24, 2020

    I have had these Sennheiser Cx-400BT headphones for a few weeks and I love them! They paired effortlessly to all my devices and are so light weight and comfortable. They fit snugly in my ears and didn't fall out. They stayed in place during exercise, walking, working etc. The hands free mic is a big plus especially when when making phone calls. The battery life is unbelievable they held up to my continuous use like a champ I know I used them for 8hrs one day without recharging and they were still going strong. The sound was rich and the bass was deep it also has a built in equalizer that lets me customize my sound. It also has a highly responsive customizable touch controls! I am very happy with them they are wonderful! I highly recommend them.

    Yes, I would recommend this to a friend.

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  • Superb sound quality
    Reviewed by Justme0419 - October 18, 2020

    Sennheiser put a lot of thought into these headphones and it really shows in the quality you get out of them. The sound quality is stellar and even better, is fully customizable within the app. Let's face it, some songs definitely need a bass boost to fully appreciate them. The battery life is another thing I found to be exceptional. I got roughly 13 hours (give or take) on a fully charged case. The design is unique and attractive and the twist to fit feature ensures the best deal for the best delivery of sound. I've been trying to come up with some cons or negatives about the Sennheiser CX 400BT, but to be honest, I can't. I love them.

    Yes, I would recommend this to a friend.

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