Kidde Wireless System Smoke Alarm

Kidde Wireless Ionization Smoke Alarm makes it easy to install an interconnected smoke alarm system throughout the home or business without wiring. The battery-powered units are linked so when one alarm sounds, it will trigger all to sound. In addition to providing protection in any room, the alarm can also be placed in a detached workshop or shed and linked into the home's system. Ten-year warranty. Power Source: Three AAA batteries (included) Sensor: Ionization Audio Alarm: 85dB at 10 ft. Temperature Range: 40°F to 100°F Humidity Range: up to 85% relative humidity (RH) Size: 5.75" Diameter x 1.25" Depth Weight: .5 lb s Interconnect: Up to 24 Kidde devices (of which 18 can be initiating) LED: Green, normal operation; Red, alarm condition Digital Display: No Warranty: 10 year limited A hard wired AC powered smoke alarm with 9V battery backup