10-year sealed lithium battery, multi-function, digital carbon monoxide alarm. Features a backlit digital display making it easy to view carbon monoxide levels or ambient room temperatures. Peak level feature retrieves the highest concentration of carbon monoxide measured. Provides continuous protection for 10 years without battery replacement. Modern, compact design allows for easy tabletop placement or wall mount application. Emits a loud, 85 decibel alarm if carbon monoxide levels are detected at dangerous levels. Meets UL2034 standards. 10-year limited warranty.