First Alert CO400B Single Gas Carbon Monoxide Detector – White

Works during power outages. No installation required. Place or mount almost anywhere. Mute/test button to quiet unnecessary alarms, test alarm function. Low battery mute quiets low battery signal for up to 8 hrs. Front-open compartment allows battery change without taking alarm down. Electrochemical sensor is the most accurate technology available for detecting carbon monoxide. 

• Low battery warning
• 85 dB alarm
• Meets UL2034 standard.
• Uses 9 V battery, included
• Dimensione: 8 x 3 x 7 inches