The First Alert CO710A is a battery powered carbon monoxide alarm with 10 year sealed lithium battery.  It can be installed without any need to replace batteries annually.  It features a  built in LCD screen to display status when a button is pressed or carbon monoxide is detected. Since it's battery powered it can be placed wherever it's needed.

The peak level feature lets you see not just the current levels if any, but the peak level reached.

It has a loud built in 85dB siren that sounds when the CO is detected to alert family members.

The CO710A is for use indoors and is commonly installed in homes, cottages, RV's, motor homes for bedrooms, basements, living rooms or near fireplaces or appliances that may potentially emit carbon monoxide.

The CO710A uses an electrochemical sensor for increased accuracy and features an easy access battery door, mute/silence button and end of life timer to alert when replacement is needed.

First Alert 1039749  CO710A Features:

• Electrochemical Carbon Monoxide (CO) Sensor
• Built in LCD display
• Battery powered by lithium batteries (pre-installed)
• Sealed unit - no battery changes
• Easy access battery door
• Mute/Silence button
• End of life timer
• Loud 85 dB siren
• 10 year limited warranty