The Kidde K5CO Battery Operated Carbon Monoxide Alarm - White is a portable safety device that provides essential protection against the dangers of carbon monoxide. It features a loud 85dB alarm and dual LED indicators to clearly show detection and power status. With a 10-year sensor life and a built-in end-of-life warning, this easy-to-install alarm comes with 2 x AA batteries and a 7-year manufacturer's warranty for long-term peace of mind.