If your Brid starts to make a beeping noise is because the Carbon Monoxide alarm has detected a CO presence. 

If you notice that this beeping noise happens in absence of CO please make sure you have the latest firmware installed on your device. 

Here is a useful link: How can I update Brid's firmware?

If Brid is keeping makes this beeping noise please write us to: support@atellani.freshdesk.com