Kidde DC CO/Fire/Smoke Combo Alarm (Ionization)

Combining the detection capabilities of an ionization smoke sensor with that of an electrochemical sensor, this alarm offers a fast response to fast-flaming fires as well as carbon monoxide. It also adjusts its smoke sensitivity to better discriminate between a real hazard and a false one and features a front-load battery tray. And it comes with a voice warning that clearly states the present danger?smoke or carbon monoxide?announcing ?Fire! Fire!? or ?Warning! Carbon Monoxide!?. Ten-year Warranty