Wake 'n Warn smoke alarm (1990s)

Note: There is no testing of the alarm in this video. I don't even put a battery in it. This was a rather interesting find in my grandparent's basement. Oddly enough, it was sitting in the box, but it did have a battery in it and was functioning. It was sounding the low battery alarm, though, so I pulled the battery out. I've always had a sort of thing for older smoke alarms, and I always liked the design of these Wake 'n Warn ones.