This is why we have two battery operated Carbon Monoxide detectors in all of our bedrooms.<br/><br/>RVer Dies Sleeping in RV camper - RV Tip of the Day <br/><br/>Ours have digital display and are on opposite walls. Cost is affordable at about $40 each. We think that this is important enough to have a redundant backup in case one unit decides to fail. Just don't want to disappoint...