Universal 10-Year Battery 3-in-1 Smoke Fire Carbon Monoxide Voice Alarm 2-PK
Each alarm features a sealed 10-year battery for continuous protection without routine battery changes. Electrochemical carbon monoxide sensor. Voice alerts for smoke, carbon monoxide, and end-of-life notifications.
4 Pack USI 10-Year Battery Combination Smoke Carbon Monoxide Detector, Open Box
Sealed box, unused