First Alert SC9120LBL Smoke & Carbon Monoxide Alarm With 10 Year Back Up Battery

Keep your family safer with this hardwired smoke and carbon monoxide alarm; The 10 year battery backup means constant monitoring for the life of the alarm even if there's a power failure, Single button test/silence. Features an electrochemical Carbon Monoxide sensing technology as well as intelligent smoke sensing technology to reduce nuisance alarms; Keyhole slots in the mounting bracket eliminate the need to remove the electrical box screws for installation. Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85 decibel siren provides a clear, loud warning upon detection. Simple to use, with a single test/silence button; Included 10 year lithium battery features a locked drawer to prevent tampering 10-year limited warranty; Equipped with end-of-life signal chirp, so you know when it’s time to replace the unit for safety. Rigorously tested to meet UL standards, Emits T3 pattern Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018). First Alert warranty extends ten years from the date of purchase with proof of the original sales receipt and the product should be free from defect in material and workmanship