First Alert Battery Powered Carbon Monoxide Alarm sells on Amazon. I think the price is very good. Please read some of the reviews and see people thought of the product.**If you’re not sure whether to buy, add to cart, and you can come back to it later!**

• SAME AS CO400A ASIN: B004Y75ZS2
• Battery operated, 9V battery included
• Mute button, mutes unnecessary alarms. Also tests alarm function with same button
• Low battery Signal mute, quiets low battery Signal for up to 8 hours
• Electrochemical sensor, most accurate technology available for detecting carbon monoxide* *compared to other common sensing technologies