FIRST ALERT SC9120B Corded Electric Combination Alarm with Adapter Plugs for Easy Replacement

Convenient adapter plugs makes it easy to replace existing hardwired alarms without needing to rewire
Keep your family safe with this hardwired First Alert smoke and carbon monoxide alarm with a 10-year battery backup, which means constant monitoring for the life of the alarm, even if there's a power failure
Combination smoke alarm and carbon monoxide detector features 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; includes 10-year lithium battery with a locked drawer to prevent tampering
10-year limited warranty; equipped with end-of-life signal, so you know when it's time to replace the unit for your safety
Rigorously tested to meet UL standards
To ensure complete protection make sure to place one carbon monoxide detector on each level of your home and in each bedroom