Product Details

Boost your sound with Sennheiser's CX 300S earphones which offer amazingly detailed sound reproduction and enhanced bass response thanks to Sennheisers transducer technology.
The in ear design reduces ambient noise to a minimum. and the included set of ear adapters guarantees an individualized fit with four sizes (XS. S. M. L) to choose from. A Smart remote enables you to pause music and take calls across all devices.


  • Built-in microphone and remote for call and music control.
  • Ergonomic In-Ear design for ambient noise isolation and undisturbed listening.
  • Tough and tangle-free cable for long-lasting listening enjoyment

What's in the box?

  • CX 300S earphones
  • Ear adapter set
  • (XS/S/M/L)
  • Storage pouch


  • Technical Data
  • Impedance 18
  • Frequency response (Microphone) 100 - 10,000 Hz (-10 dB)
  • Frequency response 17-21,000 Hz (-10 dB)
  • Headphones type - In-ear
  • Headphones use - Travel
  • Noise reduction type - Sound isolation
  • Sound-Isolating - True
  • Built-in microphone - True
  • Manufacturer's warranty - 2 Years
Model number:
  • 508595

Delivery and Returns

Delivery information:
This item may be delivered separately from other items purchased
Returns Policy:

Many of our products come with a guarantee or warranty from the manufacturer. If you are unhappy with the condition or performance of your new items, please get in touch with the Rewards Store Customer Service team via the Contact Us page.

To read more about our delivery and returns information please visit:

Ratings and Reviews


CX 300S In-Ear Wired Headphones

15,640 PTS
2,000PTS + $48.78
Now 40% off points
Save 6,260 points
Note: Sale ending on 30 Jun 2021 01:59 PM (AEST) while stock lasts
Standard delivery
1,200 PTS or $8.00
Dispatches in 10 days
EST. delivery charge