Kidde Firex KF20 Optical Smoke Alarm Mains Operated with Battery Back Up

Interlink with up to 23 Firex hard-wired alarms Combined test/hush button Auto reset Tamper-resistant locking device Mains operation The Kidde KF2 smoke alarm is a mains powered alarm contains battery in it as a backup in case of a power cut., Weight: 0.6172943336 pounds, Manufacturer: Kidde