Features:

• Provides 10-year sealed lithium battery and digital display. Never change a battery.
• LED Lights - Green for normal operation, Red for alarm, Amber for error.
• Digital Display shows the level of carbon monoxide the unit is sensing and updates every 15 seconds.
• Peak Level Memory - Displays the highest CO concentration measured since the last reset.

Key Features:

• Sealed-in Lithium Battery – Sealed-in lithium power supply; no battery replacement required over the 10 year life of the alarm. Eliminates worry about battery removal or unauthorized deactivation of alarm.
• Digital Display – Shows CO level in PPM (parts per million). Updates digital reading every 15 seconds allowing you to see if levels change.
• Peak Level Memory – Displays the highest CO concentration measured since the last reset.
• Self Activation – Alarm automatically activates when attached to the mounting bracket.
• Box includes two 10-year battery operated digital display 
• Test/Reset -Tests CO alarm circuit operation and allows you to immediately silence the alarm.