KIDDE PLUG-IN COMBINATION COMBUSTIBLE GAS AND CARBON MONOXIDE DETECTOR WITH 9-VOLT BATTERY BACKUP (604000)

AC powered, plug-in CO and explosive gas alarm
Includes 9V battery back up that provides protection during a power outage
By pressing the Peak Level Button you can see the peak CO level recorded by the alarm since it was last reset or unplugged
The continuous digital display shows you the level of carbon monoxide (if any) the unit is sensing as well as if gas is present
The gas sensor is a metal oxide sensor designed to detect natural gas (methane) or propane
Sounder alarm offers a loud 85-decibel pulsing alarm
Alarm condition
Carbon Monoxide – 4 quick beeps, followed by 5 seconds of silence, followed by 4 quick beeps
Repeat with a number showing in the display (CO concentration in ppm)
Gas one second of alarm on, one second of alarm off, repeating with GAS shown in display
5-YEAR WARRANTY