Kidde CO detector plug-in with battery back up under $20.00 at amazon just buy one or one like it. Just plug into any 110 Volt outlet with two AA batteries. Spend a few bucks so we are not talking about you or your love ones in the past tense. Even if you don't have a generator if you are around Gas engines you could be at risk. As much as we here about PFD, Fire extinguishers this should be another thing that should be on board.