Carbon monoxide detector, carbon monoxide alarm, CO detector with LED display (AA battery not included)

【How to Use the Carbon Monoxide Detector】 Powered by AA batteries, it automatically turns on after charging and then enters operating mode (the screen turns off immediately, which is normal). When the concentration exceeds 30 ppm, the screen illuminates and displays the value, allowing you to check it at any time.【Carbon Monoxide Detector】 Equipped with an LCD screen for easy reading of real-time values (ppm), it features audible and visual alarms. When the concentration exceeds a certain threshold, an audible alarm and a flashing red light will sound. This allows you to quickly and clearly determine the ppm concentration and take appropriate action to effectively protect yourself and your property.【Alarm Self-Test】 To test the product's effectiveness, perform a self-test by briefly pressing the button. If the value is not displayed on the screen and an orange light is on, this indicates that the battery is fully charged and reminds you to replace it soon. 【Widely Used Carbon Monoxide Detector】 Equipped with a high-precision electrochemical sensor, it quickly detects carbon monoxide. It can be used in the kitchen, bedroom, bathroom, garage, RV, etc. Certified to EN50291, it is of reliable quality. 【Note】: The battery has a 10-month lifespan. The audible and visual alarm may trigger a rapid power failure.