Universal Security Instruments Battery-Operated Combination Smoke and Carbon Monoxide Detector

Patented technology provides the benefits of both photoelectric and ionization in one alarm. Provides 10 years of continuous protection against fast flaming fires, slow smoldering fires and carbon monoxide. Tamper-proof, sealed battery (included) will never have to be replaced throughout the life of the alarm. Features microprocessor intelligence to virtually eliminate nuisance alarms. Quick activation battery pull tab makes the alarm easy to install while the deactivation key makes the batteries safe for disposal. Comes with a 10-year limited warranty. Manufacturer part number MIC3510SB.