First Alert Hard-Wired w/Battery Back-up Smoke and Carbon Monoxide Detector

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 Features an electrochemical carbon monoxide sensing technology as well as intelligent smoke sensing technology to reduce nuisance alarms. 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 Adapter plugs are included to save you the hassle of rewiring and to simplify installation 10-Year limited warranty; equipped with end-of-life chirp, so you know when it's time to replace the unit for your safety Rigorously tested to meet UL standards The First Alert Hardwired Combination Smoke and Carbon Monoxide Alarm detects both carbon monoxide and smoke in a single device.