The Google Nest Protect 2nd Generation Battery-Powered Smoke and Co Alarm is a white-coloured smoke and carbon monoxide detector that is compatible with Nest's smart home technology. This alarm is battery-powered and includes 3 batteries in the package, with a manufacturer warranty of 2 years. The compact size of the alarm, with a diameter and depth of 1.5 inches, makes it easy to install in any home. With its Wi-Fi smart home protocol, this alarm sends alerts to your smartphone in case of any emergencies, providing added security and peace of mind for you and your family. Works absolutely fine however the battery plate won’t stay shut but when the mount is on it doesn’t matter. Please check all images. Thank you
eBay