Abstract: There is provided a headset system for establishing a call session between a selected plurality of users. The headset system comprises a pair of headphones worn by an end-user, and providing audio features for the user, the pair of headphones shaped to substantially fit inside a helmet. The headset system also comprises a companion application running on the end-user's connected device and connected to the pair of headphones, in which the companion application is used for setting up a group consisting of a selected plurality of users; in which the end-user, via a single user input, is able to establish a call session through the connected device between the selected plurality of users without having to take the helmet off and without handling the connected device.