With a PC, plug the supplied USB cable into the sena device, and plug it into your puter. Various driver will load, followed by a prompt to download the sena device manager.
This will look for software updates for your device, after which, look at the menu items (on the left I think) for the settings option. you can see the settings of your unit, and make changes.
For an android device, go to the playstore, and look for sena. download the app and run it . the app will search for you device (bluetooth) and then you can adjust all sorts of things.