Firex Wire-in Combination Carbon Monoxide and Smoke Alarm

This alarm features Smart interconnect that interconnects up to 24 Kidde devices (of which 18 can be initiating). It also features peak level memory that announces "carbon monoxide previously detected" if alarm has detected a CO level of 100ppm or higher since it was last reset.

Firex Wire-in Combination Carbon Monoxide and Smoke Alarm: Smart interconnect: Interconnects up to 24 Kidde devices (of which 18 can be initiating) Battery backup (2 AA batteries included) Front loading battery door Battery lockout system Alarm tamper resist Peak level memory: Announces "carbon monoxide previously detected" if alarm has detected a CO level of 100ppm or higher since it was last reset Hush feature: Silences nuisance alarms for approximately 9 minutes Ionization sensor technology: Ideal for detecting fast flaming and other types of fires Test button functions Green LED Red LED