First Alert 10-Year Carbon Monoxide Alarm, White, CO910

The First Alert CO910 Carbon Monoxide Alarm with 10-Year Battery is designed to provide you with a decade of uninterrupted carbon monoxide monitoring. This carbon monoxide detector uses an electrochemical carbon monoxide sensor, the most accurate CO detection technology available, to detect the CO you can't see, smell, or taste in the air. A built-in 10-year lithium ion battery provides continuous protection for the lifetime of the alarm, with no need to ever worry about changing batteries. Measuring a fraction of the size of traditional CO monitors, this stylish model is designed to mount unobtrusively on the wall or sit on top of a dresser or table. An 85-decibel horn sounds if carbon monoxide levels are too high, and a test/silence button silences the alarm and allows you to test its functionality.