General description The Kidde 5COLSB Carbon Monoxide Alarm continuously monitors for the presence of deadly carbon monoxide (CO) in the home, providing constant protection against the effects of this hazardous gas. It features two LED indicators: a red LED that illuminates when CO is detected and a green LED that confirms DC power is present. The alarm can be installed on a wall or placed on a tabletop or shelf for added convenience, making it ideal for use in homes, during holidays, or in rented accommodations. The Lifesaver 5CO has a 7-year sensor life with an end-of-life warning to alert users when it's time to replace the unit.