High Quality CO Detector: The carbon monoxide detector uses highly accurate and reliable electrochemical carbon monoxide sensors to quickly detect carbon monoxide gas leaks. Can be used in kitchens, bedrooms, etc. Self-test function: This carbon monoxide detector has an automatic self-test function to detect hardware errors, which is carried out approximately every 1 minute in normal standby state. User Replaceable Batteries: The CO-a detector is powered by three 1.5V AAA alkaline batteries (batteries not included). Easy to install and replace. Dual AlarmWhen the carbon monoxide detector detects a dangerous concentration of CO, it emits an audible and visual alarm signal. 100% Satisfaction: The carbon monoxide detectors comply with the EN50291 standard and have undergone numerous quality tests to ensure the safety of your family. Test/Silence button< /p> Drcken Sie die Testtaste, um den CO-Melder manuell zu testen, um den ordnungsgemen Betrieb sicherzustellen. Auch Fehlalerte knnen durch Drcken der Testtaste beseitigt werden. Undervoltage alarm Battery charge status is detected every 50 seconds . If the battery voltage is too low, the buzzer will sound once and the error indicator will flash once every 60 seconds. New batteries should be replaced immediately. LED status light Das LCD-Display zeigt die CO-Konzentration in der Luft in Echtzeit an , die 3-farbige LED-Statusleuchte und der akustische Alarm machen es einfach, den Betriebszustand des Detektors zu erkennen.