---
product_id: 231177800
title: "SennheiserCX 400BT True Wireless Earbuds Bluetooth In-Ear Headphones for Music and Calls with Noise Cancelling and Customizable Touch Controls, Black"
brand: "sennheiser"
price: "1523 zł"
currency: PLN
in_stock: true
reviews_count: 1
url: https://www.desertcart.pl/products/231177800-sennheisercx-400bt-true-wireless-earbuds-bluetooth-in-ear-headphones-music
store_origin: PL
region: Poland
---

# Customizable touch controls 7mm dynamic driver for rich sound 20 hours total battery life SennheiserCX 400BT True Wireless Earbuds Bluetooth In-Ear Headphones for Music and Calls with Noise Cancelling and Customizable Touch Controls, Black

**Brand:** sennheiser
**Price:** 1523 zł
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your sound game—because your ears deserve the best.

## Quick Answers

- **What is this?** SennheiserCX 400BT True Wireless Earbuds Bluetooth In-Ear Headphones for Music and Calls with Noise Cancelling and Customizable Touch Controls, Black by sennheiser
- **How much does it cost?** 1523 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/231177800-sennheisercx-400bt-true-wireless-earbuds-bluetooth-in-ear-headphones-music)

## Best For

- sennheiser enthusiasts

## Why This Product

- Trusted sennheiser brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ergonomic Comfort Fit:** Four sizes of silicone ear adapters ensure a secure, comfortable fit for every ear shape.
- • **Seamless Connectivity:** Bluetooth 5.1 with wide codec support (AAC, aptX, SBC) guarantees flawless audio on any device.
- • **All-Day Battery Freedom:** Up to 20 hours of uninterrupted music with quick charge—10 minutes for 1 hour playback.
- • **Immersive Sound Experience:** Premium 7mm dynamic drivers deliver crystal-clear audio with deep bass and crisp highs.
- • **Tailored to Your Lifestyle:** Fully customizable touch controls and built-in equalizer adapt sound and functions to your preferences.

## Overview

The Sennheiser CX 400BT True Wireless Earbuds combine premium 7mm dynamic drivers with customizable touch controls and a built-in equalizer to deliver personalized, high-fidelity sound. Featuring Bluetooth 5.1 and support for multiple codecs, these earbuds ensure seamless connectivity across devices. With up to 20 hours of battery life and ergonomic silicone tips in four sizes, they offer all-day comfort and convenience for music lovers and professionals on the go.

## Description

SennheiserCX 400BT True Wireless Earbuds Bluetooth In-Ear Headphones for Music and Calls with Noise Cancelling and Customizable Touch Controls, Black

## Features

- Audio quality is our top priority: Experience great sound with a 7 millimeter dynamic driver and a wide range of Bluetooth codec support
- Long battery life (20 hours) and comfortable wearing: Get up to 20 hours of music playtime with one charge - The ergonomic design​ offers optimal comfort and secure fit with 4 ear adapter sizes​​
- Personalize to your everyday needs: Fully adaptable controls for music, calls and voice assistant​ - Built-in audio equalizer​ adapts the sound to your personal preferences
- Full digital control with our app: Our Smart Control app for iOS / Android​ allows all of the earphone functionalities to be modified to your personal choice
- Enjoy outstanding sound quality no matter your mobile device or your surroundings with our wide range of audio codec support including AAC, aptX, SBC as well as passive Noise Cancelling
- Sennheiser uses decades of expertise to drive the world of audio technology forward with every product - for new, unique sound experiences
- Included components: CX 400BT True Wireless, Charging case, USB-C charging cable, Silicone ear adapter sets (in size XS/S/M/L)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Age range (description) | Adult |
| Material | Silicone |
| Specific uses for product | Travel, Music |
| Charging time | 20 Hours |
| Compatible devices | smartphones, tablets, laptops, desktops, car audio systems, smart speakers, televisions |
| Control type | Voice Control |
| Cable feature | Detachable |
| Item weight | 0.42 Ounces |
| Water resistance level | Not Water Resistant |
| Frequency range | 20Hz - 20,000Hz |
| Unit count | 1.0 count |
| Style | In-ear |
| Control method | Touch |
| Number of items | 1 |
| Product Dimensions | 5.9 x 3.38 x 4.23 cm; 11.91 g |
| Batteries | 1 Lithium Polymer batteries required. (included) |
| Item model number | CX400TW1 Black |
| Manufacturer | Sennheiser |
| Form Factor | Earbuds |
| Power Source | Battery-Powered |
| Average Battery Life (in hours) | 20 Hours |
| Are Batteries Included | Yes |
| Lithium Battery Energy Content | 55 Milliamp Hours (mAh) |
| Lithium Battery Packaging | Batteries contained in equipment |
| Lithium Battery Weight | 0.45 Grams |
| Number Of Lithium Ion Cells | 1 |
| Item Weight | 11.9 g |
| Guaranteed software updates until | unknown |

## Product Details

- **Brand:** Sennheiser
- **Colour:** Black
- **Ear placement:** In Ear
- **Form factor:** In Ear
- **Noise control:** Passive Noise Cancellation
- **Headphone jack:** usb
- **Model name:** CX400TW1
- **Connectivity technology:** Wireless
- **Wireless communication technology:** Bluetooth
- **Included components:** CX 400BT True Wireless Earbuds Silicone ear adapter sets (XS, S, M, L) Charging Case USB-C Cable Quick Guide & Safety Guide

## Images

![SennheiserCX 400BT True Wireless Earbuds Bluetooth In-Ear Headphones for Music and Calls with Noise Cancelling and Customizable Touch Controls, Black - Image 1](https://m.media-amazon.com/images/I/51iYX3g9otL.jpg)
![SennheiserCX 400BT True Wireless Earbuds Bluetooth In-Ear Headphones for Music and Calls with Noise Cancelling and Customizable Touch Controls, Black - Image 2](https://m.media-amazon.com/images/I/61AY4VxQFEL.jpg)
![SennheiserCX 400BT True Wireless Earbuds Bluetooth In-Ear Headphones for Music and Calls with Noise Cancelling and Customizable Touch Controls, Black - Image 3](https://m.media-amazon.com/images/I/61SZwYoUiyL.jpg)
![SennheiserCX 400BT True Wireless Earbuds Bluetooth In-Ear Headphones for Music and Calls with Noise Cancelling and Customizable Touch Controls, Black - Image 4](https://m.media-amazon.com/images/I/611VgvPkxxL.jpg)

## Available Options

This product comes in different **Colour Name** options.

## Questions & Answers

**Q: If you only use one earbud dows the other one work if u have the main one on**
A: Thanks for your question. CX 400BT True Wireless earphones deliver stereo audio via their left and right earbuds. However, the user can use the right earbud, which serves as the ‘master’ earbud to establish the connection to the paired Bluetooth device, as a stand-alone unit for phone calls and voice assistant access.
World Wide Stereo is 42 years old and a proud authorized Sennheiser dealer.

**Q: Will these work with my smart tv in place of the sennheiser headet i’m currently using?**
A: If your smart the has blu tooth it should.

**Q: Are these good for taking calls?**
A: They are OK at best for taking calls. There are better options for that but these will work. Sennheiser is more about great sound quality for music.

**Q: How do I find wireless earbuds for my android phone motorola?**
A: These should work fine with your Motorola phone as long as it is a recent enough model to have Bluetooth. Actually, your Motorola phone, if it has Bluetooth will work with just about any wireless earbuds.

## Customer Reviews

### ⭐ Great sounding when they work
*by L***R on 11 November 2021*

The earbuds themselves sound great! They don’t have noise cancellation but they may as well do as their tight seal means that unwanted sound is greatly reduced. Touch controls could do with some work. Although their position on the earbuds and sensitivity is good, it is quite difficult to change the bindings through the app.Now for the bad bit. They love to ruin your day by not working. They have broken twice on me now and it’s the same problem, the left earbud not outputting any sound. I honestly can’t believe how Sennheiser expected to get away with this atrocity of bad design. This one flaw takes what could have been a great addition to Sennheiser’s lineup of headphones to a dark stain, that to me, ruins their brand reputation. They should be ashamed of this abysmal oversight.That said, their maintenance and customer service team have done a good job with the warranty. The replacement pair came relatively quickly and did work for some time. Not happy with the £5 shipping fee that the customer must foot to make up for Sennheiser’s faulty products, however.Please do not buy this product. I beg you. Please teach them not to release a mess of a product again.Sincerely, a vexed customer.

## Frequently Bought Together

- Sennheiser CX 400BT True Wireless Earbuds - Bluetooth In-Ear Headphones for Music and Calls - with Noise Cancellation and Customizable Touch Controls, black
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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-01-23*