First Alert Battery Operated Combination Smoke/Carbon Monoxide Alarm with Voice Location: * Features 2 alarm systems that work independently to detect evidence of fire and of carbon monoxide * Easily programmable * Features separate audible and visible * 85-decibel alarm and flashing red LED clearly indicate the nature of the threat * Signals let you know precisely where the danger is located * Powered by 2 "AA" batteries (included) * Stores CO readings and verbally communicates the highest level of CO detected * Most household remote controls are compatible with this system * Alarm mute button silences unnecessary alarms and allows you to test alarm function * Low-battery warning indicates waning power * End-of-life alarm tells you when it"s time to replace the unit * Side-access drawer makes for easy battery changes * 5-year warranty * Model# SCO7-8CSD-8