Special featuresThis Nedis© CO detector with display detects carbon monoxide (CO) for increased safety and quickly shows the current value.This detector ensures you are warned in time in case of higher concentrations of carbon monoxide, with a loud 85 dB alarm.It is equipped with a battery with an estimated lifespan of up to 5 years and a sensor with an estimated lifespan of up to 10 years. The detector is equipped with a high-quality sensor, which constantly measures the concentration of carbon monoxide in the air.Carbon monoxide is deadly, odourless, and invisible, making it undetectable without a detector.This dangerous gas is caused by incomplete combustion and can occur near your central heating boiler, geyser, or chimney.It complies with the required European standard EN 50291.