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Intuitive LED: The CO alarm detector uses a 3-colored LED indicator to show the working status. Green for normal operation, red for alarm, and yellow for failure.7 Years of Continuous Protection: Up to 7 years of uninterrupted operation due to high efficiency and high battery capacity.Informative LCD: Displays real-time CO levels.LCD allows you to see any dramatic changes in CO levels, and it is easy to determine the remaining battery life and working status.

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