Kidde KN-COSM-IBA Hardwire Combination Smoke/Carbon Monoxide Alarm with Battery

The KN-COSM-IBA combines a Carbon Monoxide and Ionization Smoke Alarm, providing two important safety devices in a single unit. This alarm includes a voice warning system that helps eliminate confusion, as it tells you if its detected fire or carbon monoxide, or even if it needs a new battery.