Carbon monoxide detector, CO detector, battery-operated carbon monoxide alarm with LCD screen

Easy Installation: The carbon monoxide detector comes with screws for easy wall or ceiling mounting. Powered by three AA batteries (not included), it requires no wiring, is portable and easy to use, and doesn't need a mains power outlet. It continues to monitor even during a power outage! Battery life is approximately 36 months, and replacement is simple. High Accuracy and Reliability: Its built-in electrochemical carbon monoxide sensor accurately detects the carbon monoxide (CO) concentration in real time. Instant Alarm: When the carbon monoxide detector reaches the alarm threshold, the sensor detects carbon monoxide, the red LED flashes, the LCD screen lights up blue, and an 85-decibel audible alarm sounds to alert you. Self-Test Function and Informative LCD Screen: When powered on, the device beeps, and the red LED flashes once. The LCD screen displays "888". Press the test button: a new beep will sound and the red LED indicator will flash again. It displays the carbon monoxide concentration in real time and memorizes the last recorded dangerous level. "Err" displayed on the LCD screen indicates a malfunction. "Lb" displayed indicates a low battery and the need to replace it. After 3 seconds of "000" being displayed, the device resumes normal operation. Numerous applications: This carbon monoxide detector is suitable for living rooms, kitchens, bedrooms, offices, hotels, student residences, and can also be used while traveling. It effectively prevents fires and provides reliable protection for your family's safety.