Kidde Smoke & Carbon Monoxide Detector with Voice Alerts, Battery Powered, Combination Smoke & CO Alarm

2 units in 1: unit alerts you to smoke & carbon monoxide by sounding a loud, 85-decibel alarm & sounding voice alarms Ionization sensor technology senses invisible fire particles, while an electrochemical sensor detects CO gas 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 Operates on 2-AA alkaline batteries, providing reliable detection during a power failure Front-load battery door makes installation & replacement easy Tamper-resistant design: deters removal of the carbon monoxide smoke detector combo from the ceiling Test-Hush Button makes testing the detector or silencing false alarms easy (false alarms may occur from routine cooking, shower steam, dust or humidity) 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.