First Alert Battery-Powered Electrochemical/Ionization Smoke and Carbon Monoxide Detector

2 in 1 Battery-powered smoke & CO alarm with silence/test button Features convenient silence/test button, blinking power light, 85-decibel alarm Also includes side battery drawer and missing battery guard Low battery warning and tamper resistant 9-volt battery included, recommended battery replacement every 6 months
Battery-powered smoke & CO alarm with silence/test button.
85-decibel alarm
Side battery drawer and missing battery guard .
Low battery warning.