Does the Accessible Control Unit need an internet connection to work?

The Accessible Control Unit does not require an internet connection to work, but instead communicates with your Pro Connected Smoke, Heat and CO alarms via a secure radio frequency.
The only time you would require an internet connection with the FireAngel Pro Connected product range is when you are adding a Gateway and the FireAngel Connected App in to the network. This will enable push notifications to your phone or other smart devices, but if your internet supply fails the alarms will still function within the home and alert you to danger.