Photo Smoke/CO Detector

White, Photoelectric Carbon Monoxide & Smoke Detector, Photoelectric Smoke Sensor Reduces Nuisance Alarms, Slim, Round Design, 40' Detection Range, Features A Test/Silence Button, 85 Db Alarm Loudness, Uses 2 "AA" Batteries, Included, UL Listed, 7 Year Limited Warranty, Clamshell.