Kidde Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 1 Pack

• 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 • 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 Listed with a 10-year limited warranty which begins when the alarm is powered on, if that date is unknown it should be assumed the alarm should be replaced.