To use the video door entry functions, simply install the Classe 300 EOS, configure it and power it. To use call forwarding on your smartphone and access the functions from the Home + Security app, you must download the app (available free of charge on the Apple store and the Play store), create an account or log in with an existing account and configure the app via the assistant. To use the Amazon Alexa functions, you must configure an Amazon account using the assistant.