Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup, Voice Alerts, Interconnectable & Smoke Detector, Hardwired Smoke Alarm with Battery Backup, Front-Load Battery Door

• 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: 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 Product 1: 85-decibel alarm alerts to smoke, fire, or carbon monoxide Product 1: 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: Ionization sensing technology - hardwired smoke detector senses invisible fire particles, 85 decibel alarm alerts of fire Product 2: Whole home detection - easily install 1 fire detector on each level of your home & in each bedroom Product 2: Still works during power failures - smoke alarm with battery backup operates on a 120V power source with 9V battery included Product 2: Front-load battery door - For quick battery replacements