To use the video intercom system features, simply install the Classe 300 EOS unit, configure it and power it on. To use call forwarding to smartphones and access functions from the Home + Security app, you need to download the app (available for free in the Apple and Play stores), create an account or log in with an existing account and configure the app using the wizard. To use the Amazon Alexa features, you need to set up an Amazon account using the wizard.