First Alert Smoke Alarm- SA303 & Carbon Monoxide Alarm- CO400-NEW A12

Battery included, all works. The First Alert Smoke Alarm SA303 and Carbon Monoxide Alarm CO400 are reliable and essential home security devices. These detectors are powered by a single battery, with the battery included in the packaging. The white color and unopened features ensure that they are brand new and ready to use straight out of the box. Manufactured in Mexico, these units provide safety and peace of mind for your home, giving you an added layer of protection against potential fire and gas hazards.