What is the function of the Jabra Engage Link controller?

The Jabra Engage Link controller connects the Jabra Engage 50 to a computer and enables call control between the headset and a softphone client. This control unit for Jabra Engage series corded headsets enables easy call control with adjust volume, mute, speed dial, answer and end call functionality. Stay-flat design.

Comes in MS (Microsoft Teams) or UC (Unified Communications), USB-A or USB-C variants.