Kidde Dual Sensor, 120V AC with Battery Backup Smoke Alarm

Features both an ionization and photoelectric sensor; The ionization sensor may respond faster to flaming fires, while the photoelectric sensor may respond faster to smoldering fires

Interconnects with up to 24 Kidde devices (of which 18 can be initiating) on one wiring network

Battery backup (9V battery included) provides continuous protection even during power failures

Red LED light flashes every 30-40 seconds to indicate that the smoke alarm is operating properly

Green LED light is continuously illuminated to indicate AC power

Smart Hush feature temporarily silences nuisance alarms