Direct Wire IoPhic Combo Carbon Monoxide/Smoke/Natural Gas Alarm

Direct Wire IoPhic Combination Carbon Monoxide, Smoke And Natural Gas Alarm - Universal Sensing Technology - 120 Volt - Quick Draw Battery Drawer - Three LEDs: Power, Alarm And Trouble - Combined Test/Silence Button - Superior Nuisance Alarm Resistance Adjusts Sensitivity Based On Changes In Room Temperature And Humidity - End-Of-Service Life Warning (7 Years) - Large Mounting Ring - Tamper Resistant - 7-Year Warranty - 9 Volt Battery Included - Base Plate Diameter: 5-5/8" - Mfg #MDSCN111