Sennheiser CX True Wireless Earbuds with Passive Noise Cancellation

$129.95 OR

Color: Black - Out of Stock

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Model: 508973 UPC: 615104355040 Item: 3533

Product Information

Superior Sound. No Compromise.


  • Passive Noise Cancellation
  • Customizable Touch Controls
  • IPX4
  • TrueResponse Transducer
  • 27 Hour Battery Life

Superior Audio

Wherever you are, whatever you do; enjoy your favorite tracks to the max with the bespoke TrueResponse Transducer for crystal-clear sound.

Intense Groove

With the Bass Boost added and the Built-In Equalizer activated via the Smart Control App, you can have your sound your way.

Skip the Noise

You can forget about your surroundings and get lost in the music or focus on your call thanks to the Passive Noise Cancellation.

Easy to Wear

The eye-catching ergonomic design assures superb wearing comfort. And with ear adapters in 4 sizes, it's easy to achieve a perfectly secure fit for any activity.

At Your Fingertips

Customizable touch control enables easy control of audio, phone calls, and fast access to Siri and Google Assistant.

Even in the Rain

Go outside at any time to have an outstanding audio experience, even when it's wet; you can rely on their IPX4 splash resistance.

Create Your Sound Experience

Pair your CX True Wireless earbuds with Sennheiser's Smart Control App. Customize what you hear and how you interact with your device.



  • Dimensions
    • Earbuds and charging case: 2.3" x 1.3" x 1.6"
  • Weight
    • Both earbuds and charging case: 49g 
    • Single earbud: 6g
    • Charging case: 37g
  • Power supply: 5 V 600 mA max
  • Speaker type: TrueResponse Transducer Sennheiser 7mm dynamic driver
  • USB Standard: USB-C
  • Frequency response (Microphone): 100 Hz to 10 kHz
  • Frequency response (Headphones): 5 Hz - 21,000 Hz
  • Microphone: 2 mic beamforming arrays (4 mics in total)
  • Supported Profiles: A2DP, AVRCP, HFP
  • Ear Coupling: In-ear, closed acoustics
  • Charing Time: 1.5 h for full charge / 15 min for 1 h playtime
  • Battery Specification: Built-in Lithium-Ion rechargeable batteries L/R earbud: ~60 mAh; charging case: ~400 mAh
  • Bluetooth: Bluetooth 5.2 compatible, class 1, BLE
  • Codecs: SBC, AAC, aptX™
  • Equalizer: EQ pre-set via Smart Control App
  • Bass Boost: Via Smart Control App
  • Battery Time: Up to 9 hrs music playtime with earbuds Up to 27 hrs music playtime with charging case
  • Noise Cancellation: Passive Noise Cancellation
  • App Support: Sennheiser Smart Control App for iOS™ and Android™


What's in the Box

What's in the Box

  • CX True Wireless Earbuds
  • Silicone ear adapter sets (XS, S, M, L)
  • Charging Case
  • USB-C Cable
  • Quick Guide & Safety Guide


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Why did you choose this?
World Wide Stereo Store
I needed some ear buds in order to do regular cellphone calls, in addition, I may use these to listen to music.
David D on May 2, 2022
I needed some ear buds in order to do regular cellphone calls, in addition, I may use these to listen to music.
David D on May 2, 2022
Are these talking buds?
Keith B on Apr 7, 2022
  Thanks for your inquiry. The Sennheiser CX Earbuds have no talking function.