Kidde AC/DC CO/Smoke Combo Alarm (Photoelectric)

Front-loading alarm offers protection against two hazards?fire and carbon monoxide?in one unit. When activated, it emits a beeping tone, followed by a voice warning that clearly announces ?Fire! Fire!? or ?Warning! Carbon Monoxide!? The uniquely designed front-loading battery compartment also makes battery replacement quick and easy and ensures proper installation. Manufactured with photoelectric sensors for detecting slow, smoldering fires, this alarm also includes the world?s most accurate CO sensing technology. Seven-year warranty.