First Alert CO250RVA Battery Powered Carbon Monoxide Alarm, UL/RV Approved

Equipped with an electrochemical carbon monoxide sensor, a test switch, an 85-decibel horn, and a red LED power indicator, this carbon monoxide detector warns you to the presence of carbon monoxide.

• Hinged Cover Design - Allows for fast, easy installation and battery replacement
• Silence Feature - Silence unwanted alarms. Test alarm with the same button.
• Tamper Resistant Locking Pin locks alarm to to base to prevent removal of battery
• 9V alkaline battery included
• 10 Year CO Sensor/10 Year Alarm Life
• 10-Year Limited Warranty