First Alert 1039807 Hardwired Smoke & Carbon Monoxide Alarm with 10-Year Battery Backup GiftsForSeason BATTERYSENSE shows you how much

BATTERYSENSE shows you how much battery remains

Fast dry reduces tracking

Ideal for use in entryways

Improved lightning protection

This 1/3 HP

First Alert 1039807 Hardwired Smoke & Carbon Monoxide Alarm with 10-Year Battery Backup GiftsForSeason BATTERYSENSE shows you how muchThe First Alert Hardwired Combination Smoke and Carbon Monoxide Alarm uses an electrochemical CO sensing technology and Ionization sensor for smoke detection. It includes a 9 volt battery for continued function in the event of a power outage, and it features a test silence button, tamper resistant locking brackets, and a universal mounting bracket. This CO smoke detector can be connected to other compatible BRK and First Alert hardwired smoke and