Kidde PI2010CA-N Smoke Alarm, 10 ft, LED Display, 85 dB, Alarm: Audio, Ionization, Photoelectric Sensor

The Kidde Pi2010CA is a 120 VAC, wire-in smoke alarm with 9 V battery backup that can function as a stand-alone unit or interconnect with up to 24 Kidde devices (of which 18 can be initiating). The Kidde Pi2010CA provides continuous protection against smoke and fire hazards, even during power outages. This smoke alarm combines both photoelectric and ionization sensors to offer the best protection against both fast flaming and slow smoldering fires. Leading authorities recommend that both ionization and photoelectric smoke alarms be installed to help ensure maximum detection of the various types of fires that can occur within the home. Ionization sensing alarms may detect invisible fire particles (associated with fast flaming fires) sooner than photoelectric alarms. Photoelectric sensing alarms may detect visible fire particles (associated with slow smoldering fires) sooner than ionization alarms.