The 2-Channel (2C) headset allows the user to switch between two active groups. Ideal for managing multiple teams, projects or groups without any hassle. The cable has an internal XLR connection, and the two groups are identified by "X" and "O" on the button.
Except the 2C button, this headset is exactly the same as the Boom MIC III (Open Mic) headset. Its details can be found from here.
Please note that this is only compatible with DualGroup units.