They may have been. I don’t know of any early B.R.K./First Alert alarms that were sealed. The only square-based B.R.K.alarm I know of is the 79DCRI, which has a built-in relay.
They may have been. I don’t know of any early B.R.K./First Alert alarms that were sealed. The only square-based B.R.K.alarm I know of is the 79DCRI, which has a built-in relay.