First Alert CO600 120V Plug-In Carbon Monoxide Alarm uses advanced electrochemical sensors to detect dangerous carbon monoxide levels in your home. This reliable plug-in detector emits a loud 85-decibel alarm to alert you immediately if a hazard is detected. Carbon monoxide is an odorless, tasteless, and invisible gas that poses a serious risk as a leading cause of accidental poisoning deaths in the United States. To ensure safety, it is to have a carbon monoxide alarm on every level and in every bedroom of your home. The alarm easily plugs into any standard electrical outlet and features a low battery indicator light to alert you when battery power is running low. It also chirps to signal when the alarm has reached the end of its life, providing ongoing peace of mind. Remember to test your CO detector regularly to maintain optimal protection. Model Number: 1039730