This item in our house, which I assume is a smoke detector or a carbon monoxide detector, just started chirping, so I take it that I need to replace the battery or do something along those lines. But I can't figure out how to open it or dismount it; and I can't even identify the brand, so I can't Google for the instruction manual.
The item came with the house that we bought two years ago; I've e-mailed the former owner, but I'm not sure when he can get back to me about it (or whether he'd even remember what he had gotten put up). If any of you can help out, I'd very much appreciate it!
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