Electrochemical sensor | Battery lockout system -deters covering battery compartment without installation of batteries | Slide-out battery door cover -gives immediate access to batteries | Test/reset button - tests the unit for proper operation - resets the carbon monoxide alarm | Low battery signal -alerts user when the battery needs to be replaced | Green LED - flashes every 30 seconds to indicate the unit is operating properly | Red LED - when a dangerous level of carbon monoxide is detected the red LED will pulse and a loud alarm pattern will sound
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