It is a perfect item for protecting your family from the danger of carbon monoxide and very easy to read with the digital dispaly, even in a low light condition. Alarm memory feature: If the unit ever alarms, pressing the button, green LED will flashes once every second for one minute and the peak alarm level will be indicated on the LCD. Green LED:Flashes every 30 seconds to indicate the unit is operating properly. The green LED will also flash before CO reading is taken and when any button is pressed.
- Brand New and High Quality,LCD Displayer with a Blue Ground Light.Loud 85 decibel alarm,Permanent Carbon Monoxide Sensor,The Alarm Sound Pattern is Three Short Alarm Beeps. The Red LED Will Flash While in the Alarm Mode.
- One chirp every 30 seconds in an indication that the battery is low (need replacement) (green LED still flashes once every 30 seconds).
- Test/Reset button to test the unit electronics and verifies proper unit operation and reset the unit during CO alarm.
- Green and red LED lights that indicate normal operation and alarm status. The unit will sound chirp and red LED flashes once as power up.
- 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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