Kidde Smoke Detector & Carbon Monoxide Detector Combo with 10-Year Battery & Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup, Interconnectable, LED Warning Light Indicators

• Product 1: 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 Product 1: Photoelectric sensor detects visible fire particles associated with slow, smoldering fires, while the electrochemical sensor detects carbon monoxide Product 1: An 85-decibel alarm sounds & a red LED indicates the smoke detector is sensing smoke or fire Product 1: Lithium battery operated: eliminates the need for battery replacement & provides reliable detection, even during power outages Product 2: 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) Product 2: Easy installation mounting bracket included for quick installation in 4 orientations Product 2: Photoelectric sensor detects visible fire particles associated with slow, smoldering fires, while the electrochemical sensor detects carbon monoxide Product 2: 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, Manufacturer: Kidde