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CX 350BT Black


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The CX 350BT wireless earphones are the ideal companion for great sounding audio on the go. With support for the latest wireless technologies including Bluetooth 5.0, AAC and AptX™ Low Latency, the CX 350BT delivers a great listening experience. The Sennheiser Smart Control App facilitates sound customization via its equalizer as well as firmware updates and a podcast mode.


It’s time to break free. With Sennheiser sound quality, 10-hour battery life and advanced features like voice assistant support, the stylish CX 350BT wireless earphones are the ideal companion for enjoying music and videos on the go without compromise.

A great sound experience is assured by the latest wireless technology, including AAC and AptX™ Low Latency codecs for audio that stays perfectly in sync with onscreen action on compatible devices. Multi-pairing and Bluetooth 5.0 compatibility ensure fast, reliable connectivity with two devices simultaneously.

The CX 350BT ensures a truly personal listening experience thanks to the Sennheiser Smart Control App which allows for sound customization via its equalizer. Along with the personalization features, the app provides battery status, a Quick Guide, firmware updates and a podcast mode for optimized speech.

Technical Data


 28 Ω


 MEMS, omnidirectional

Frequency response

 17 - 20,000 Hz (- 10 dB)

Sound pressure level (SPL)

112 dB (1 kHz/0 dB FS)

THD, total harmonic distortion

 0.5 % (1 kHz, 100 dB SPL)

Ear coupling


Transducer principle



12 g

USB Standard

Type C

Battery time

 10 h, SBC

Ear pad material

Biocompatible Silicone

Supported Profiles


Bluetooth Version



SBC, AAC, AptX™, AptX™ Low Latency

What's in the box?

  • CX 350BT earphones
  • Ear adapter set (XS/S/M/L)
  • USB-C charging cable
  • Quick Guide
  • Safety Guide

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