To control light and scene via Alexa, Add the light switch (Feedback Switch) extension of the Gateway or Scene in the Savvy App.After discovering the devices using Alexa, you can control all (Feedback Switch) extensions and scene easily. For example, after discovering the devices, say 'Alexa, turn on Hall light' if you have a extension device (Feedback Switch) and its room name is 'Hall light',then the hall light will turn on by the light switch (Feedback Switch). Say 'Alexa, turn on watch TV' if you have a watch TV scene setup in Gateway and its name is 'watch TV',then the scene will be executed.