2-in-1 Detection - Smoke & carbon monoxide detector combo alerts you to both smoke & fire events as well as poisonous, CO gas in a single device
Voice Alarm announces the hazard type when detected: “Fire!” = smoke or fire, “Warning Carbon Monoxide” = CO gas, or "Low Battery" when the batteries need to be replaced
24/7 Self-testing components are always checking the device to ensure it's operating as expected (not a substitute for a manual push test)
Easy installation mounting bracket included for quick installation in 4 orientations
Photoelectric sensor detects visible fire particles associated with slow, smoldering fires, while the electrochemical sensor detects carbon monoxide
85-decibel alarm & LED warning indicators alert you to various status: green = normal operation, amber = operating error, and red = smoke, fire or carbon monoxide event
Battery operated to provide reliable detection, even during power outages; two AA batteries included
UL Certified with a 10-year limited warranty on alarm