Need help identifying carbon monoxide detector
Need help identifying carbon monoxide detector and how to remove it. It chirps once every few weeks for no reason. I have a Nest protect right beside it which indicates everything is ok. It appears to be hardwired so it can’t be the battery. Anyhow, it looks old and I would like to replace it with a new one but I can’t figure out how to remove it without any kind of instructions. Thanks in advance!