Keep your entire household safe with the First Alert CO600 Plug-In Carbon Monoxide Detector. Standard smoke alarms aren’t designed to warn you of the presence of this colorless, odorless, tasteless and toxic gas. The First Alert carbon monoxide detector features advanced detection technology to let you know when the compound is present. A test/silence button lets you periodically check the device to make sure it’s working properly. It’s quick and easy to set up, requires no batteries for operation and plugs into a standard dual-prong outlet for convenience.