Kidde Smart Smoke Carbon Monoxide Detector, WiFi, Alexa Compatible Device, Hardwired w/Battery Backup, Voice App Alerts Brand: Kidde Style: Smoke + Carbon Monoxide Power Source: Hardwired Color: White Product Dimensions: 1.91"D x 5.59"W x 5.59"H Item Weight: 11.2 ounces ??Voice Alarm announces the hazard type when detected: ?Fire!? = smoke or fire, "Warning! Carbon Monoxide!" = CO, or "Replace Alarm" when the unit has come to its end of life span ??Easy Installation: download the Kidde app scan the QR code on the back of the smoke alarm ??Compatible with Amazon Alexa, Google Home, iPhone, Android smart devices 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 ??WiFi enabled technology allows notifications to be sent to your smartphone (as well as friends family) in the event of a smoke or CO hazard in your home ??Photoelectric sensor technology detects visible fire particles associated with smoldering fires ??Test-Hush Button easily tests the working operation of the smoke alarm silences false alarms; the Kidde app can also be used to test the smoke CO combo alarm ??UL Listed with a 10-Year limited manufacturer warranty on the alarm only (not a battery performance claim). Warranty begins when the alarm is powered on. If that date is unknown, it should be assumed that replacement is needed.