Ionization sensor technology senses invisible fire particles, associated with fast flaming fires
Operates on 2-AA alkaline batteries (included), providing reliable detection during a power failure
An 85-decibel alarm sounds & a red LED indicates the smoke detector is sensing smoke or fire
Enables extension of coverage & protection without any need for additional wiring
When one alarm sounds, they all do, providing an early warning against fire by dramatically increasing your ability to hear an alarm anywhere in your home, regardless of where the fire starts
Test-Hush button makes it easy to test the smoke detector and silence false alarms that occur from cooking or shower steam
Interconnection capability: allows you to connect up to 18 Kidde smoke, heat, or CO alarms, with the possibly it interconnect 6 strobe lights or relay modules
UL listed with a 10-Year limited manufacturer warranty on the alarm only (not a battery performance claim). Warranty begins when the alarm is powered on. If that date is unknown, it should be assumed that replacement is needed.