Universal Security Instruments Battery-Operated 9-Volt Photoelectric Sensor Smoke Detector

Patented technology provides the benefits of both photoelectric and ionization sensing in one alarm. Provides 10 years of continuous protection against fast flaming and slow smoldering fires. Features microprocessor intelligence to virtually eliminate nuisance alarms. Quick activation battery pull tab makes the alarm easy to install while the deactivation key readies the alarm for disposal. Tamper proof, 10-year sealed battery (included) will never have to be replaced throughout the life of the alarm. Fast and easy installation, no wiring required and hardware included. The single silence/test button temporarily quiets nonemergency alarms and tests alarm functionality. Limited ten year warranty on the battery and alarm. Manufacturer part number MI3050SB.