How to upgrade MonoLED and DuoLED firmware

Take the steps described in this Guide to upgrade Mono/DuoLED firmware in order to increase the volume level by +10 dB.

Mono/DuoLED User GuidePhones Accessories Quick Start Guide.

Created: September 2020

Updated: February 2023



  • Windows OS
  • Wildix Mono/DuoLED Headset

Before upgrading, download and unpack the Upgrade Utility:


To upgrade, proceed with the following steps:

  1. Press and hold the Mute button and then connect the Headset to you PC via USB port:

  2. Start the CM65xx.exe which is the Upgrade Utility:

  3. After the successful upgrade you get the following notification:

  4. After the update, re-connect the Headset's USB cable into your PC
  5. Uninstall the Upgrade Utility: go to Device Manager -> Sound, video and game controllers -> Wildix DuoLED (MonoLED):

  6. Open Driver tab. Press Uninstall Device button and then Uninstall button:

  7. Re-connect the USB cable into the PC one more time