Kidde Nighthawk AC-Powered Plug-In Carbon Monoxide Alarm

Digital display shows the level of carbon monoxide the unit is sensing and updates this reading every 15 secondsPeak level button displays the peak CO level recorded by the alarm since it was last reset or unplugged9V battery back-up for protection during power outageTest button function test the unit for proper operation and resets the alarmLED operation and blinking dot in lower right corner of display denotes normal operationDigital readout displays CO concentration in parts per million (30-900PPM)Provides you and your family with warning signal to protect against dangerous levels of carbon monoxide in your homeEasily installs into any AC wall outletsDigital display feature allows for easy viewing of carbon monoxide levels from 30-999PPM (parts per million)UL listedAlerts user to replace after 10 years of operation120VAC power sourceElectrochemical sensorAlarm level: 85dB at 10'Temperature range: 40˚F (4.4˚C) to 100˚F (37.8˚C) temperature rangeHumidity range: 5%-95% relative humidity (RH)Dimensions: 6.0625” x 3.75” x 1.75”Warranty: 10 year limited manufacturing warranty