To use the video intercom functions, simply install the Classe 300EOS device, turn it on and configure it. To use the call forwarding to smartphones and the access functions of the Home + Security app, you must download the app (available for free on the Apple Store and Play Store), create an account or log in with an existing account and configure the app by following the guided procedure. To use the Amazon Alexa functions, you must create an Amazon account by following the guided procedure.