First Alert Battery Operated Carbon Monoxide Alarm | CO250B, 4PK

First Alert CO250B 4‑Pack Battery‑Operated Carbon Monoxide Alarms

Each unit in this four‑piece set functions as a carbon monoxide detector powered by batteries, offering a straightforward approach to monitoring air quality. The CO250B model is identified by its battery‑operated design and its role as an alarm that signals the presence of carbon monoxide.

Included in the set are four identical devices, ready to be installed in separate locations as needed. The compact form factor and the battery power source provide flexibility for placement throughout a home or building without requiring additional wiring.