Bria is a softphone application by CounterPath that enables you to manage your communications from your computer desktop. Replacing or complementing your hard phone, Bria softphone allows you to: make VoIP and Video calls see when your contacts are available, send Instant Messages and transfer files. Sennheiser Wireless headsets did not used to have good compat with Bria... BUT there is a brand new version of Headsetup for both Windows and Mac that has call control included! Welcome back, Bria! Here’s where you can download the software for the new Headsetup: https://en-us.sennheiser.com/headset-software-pc Sennheiser Corded Headsets with Call Control require dowloading the Headsetup software.