Bluehas a customizable button (the “BlueParrott Button”) that is customizable to PTT with the 75 All Road.  Without a BlueParrott headset, you will need to use the All Road handset or the All Road Wireless PTT Button to communicate with others using the All Road.  Having the option to customize the BlueParrott button allows you to PTT directly from the headset and also switch between phone calls and CB communications while driving.