This app is used in conjunction with the Comrex Opal Gateway Hardware found at comrex.com/products/opal. Cut and paste the "invite" into the app, and you will be connected to your selected Opal studio hardware. The app delivers high-quality, low delay audio to and from the gateway, allowing for high-quality interviews from remote guests. Opal is very simple to use. Put in your invite, click "connect", and you're on the air!