Google Nest Protect Battery Smoke & CO2 Detector

Details The Google Nest Protect Battery-Powered Smoke & Carbon Monoxide Alarm. It sends a message when there's a problem or when the batteries are running low. The Split-Spectrum sensor looks for both fast and slow-burning fires. Silence false alarms with your smartphone or tablet. The Google Nest Protect speaks up if there's smoke or CO and tells you where it is, so you'll know what to do next. Usually the Google Nest Protect has its light turned off, but when you walk underneath it, Pathlight can lighten darkened areas. Powered By Six AA Batteries.