I got an issue that in wireless mode I cannot disable the sidetone. In wired mode it works okay and i can adjust the sidetone in ICue.
Found a solution that worked for me.
https://www.poly.com/us/en/support/knowledge-base/kb-article-page?lang=en_US&urlName=Computer-Headsets-How-to-Enable-Disable-Sidetone-in-Windows-7-Vista