The normal working state is that the green light flashes every 30 seconds.The blue backlit LCD display does not light up in standby mode (it will Lights up and alarms when carbon monoxide is detected).【Features】 1.Loud 85 decibel alarm 2.Backlit display 3.Alarm memory feature 4.Low battery indicator 5.Test/Reset button 6.End of unit life warning 7.Power saving feature 8.Easy installation 【Specifications】 Sensor: electrochemical co sensor Alarm tone: 85 decibels Display: LCD blue backlight digital display Low power alarm: a "built" every 30 seconds is a clue Power supply: 3 *AA batteries (not included) Standby Current:<50Ua(withoutLCD); <200uA(with LCD); Alarm Current:<75mA; Operation Ambient Condition:5~40,20~90% R.H. 【Alarm standard】 50ppm, alert within 60 to 90 minutes; 100ppm, alert within 10 to 40 minutes; 300ppm, alert within 3 minutes. 【Note】 1.This carbon monoxide alarm is designed to detect carbon monoxide gas. It is Not designed for Smoke detection or ANY Other GAS detection. 2.Before installing the Carbon Monoxide Detector, the batteries must be removed, stripped of their plastic jackets and then reinserted in the Carbon Monoxide Detector. 3.The CO Detector needs to be tested weekly! If you have any questions about the CO Detector, please contact us at the first time and our friendly customer service team will respond to you as soon as possible. 4.We have passed the CE & ROHS Certification and basis on EN50291 standard.
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