From the Manufacturer
There are only minutes to escape a house fire. The sooner you hear the smoke alarm, the sooner you can get out safely. Kidde interconnected Ionization smoke alarms provide early warning against fire by linking together the smoke alarms in your home, dramatically increasing your ability to hear an alarm anywhere, regardless of where the fire starts. The Kidde Wireless Smoke Alarm enables families to quickly install an interconnected smoke alarm system throughout their home without the mess of rewiring or cost of labor. Interconnected smoke alarms provide an earlier warning to fire because they link together so that when one alarm sounds, they all sound. This provides more warning in more places, and gives families more time to escape. This battery-powered alarm links with other alarms and components of the Kidde Wireless System to create a customized, advanced fire protection system. It even can be placed in a detached workshop or shed and linked into the home's system. Install UL listed smoke alarms on every floor of your home, in hallways, inside bedrooms and outside of sleeping areas. Replace smoke alarms every 10 years. Ionization sensing alarms may detect invisible fire particles, associated with fast flaming fires sooner than Photoelectric alarms. Studies show both types will effectively detect either type of fire. For optimal protection, install both smoke alarm technologies in your home.