Kidde Smoke & Carbon Monoxide Detector with Voice Alerts, Battery Powered, Combination Smoke & CO Alarm & Smoke Detector, Hardwired Smoke Alarm with 9-Volt Battery Backup, Test-Reset Button

• Product 1: 2 units in 1: unit alerts you to smoke & carbon monoxide by sounding a loud, 85-decibel alarm & sounding voice alerts Product 1: Ionization sensor technology senses invisible fire particles, while a electrochemical sensor detects CO gas Product 1: Voice Alarm & an 85-decibel alarm announces a hazard when detected: “Fire!” = smoke or fire or “Warning Carbon Monoxide” = CO gas, or "Replace Battery" when the battery needs to be replaced Product 1: Operates on 2-AA alkaline batteries, providing reliable detection during a power failure Product 2: Ionization sensor technology senses invisible fire particles, while a electrochemical sensor detects CO gas Product 2: Smoke alarm operates on a 120V wired power source with a 9-Volt alkaline battery backup Product 2: An 85-decibel alarm sounds & a red LED indicates the smoke detector is sensing smoke or fire Product 2: Test-Hush button makes it easy to test the smoke detector and silence false alarms that occur from cooking or shower steam, Manufacturer: Kidde