Initializing YoLing devices thru the phone app generally is a bit confusing, where a device needs to be added to a YoLing hub. However, the app calls the hub "room", because when the hub was installed, we had to assign which "room" it is for. Once you get an idea, it is fine.Second, steps to creating a scene, for example, to trigger the siren to sound when a YoLing sensor detects a motion. I made it to work thru trial and errror. After linking the siren to 2 YoLink sensors, I am still pretty fuzSee full review