This product is of high stability voice type carbon monoxide detector(hereinafter referred to as detectors),using for detecting carbon monoxide gas leakage, carbon monoxide detectors selected advanced electrochemical sensors; with high stability, small sensitivity drift characteristics. This Products using digital backlit LCD to display alarm levels, when the detector detects CO leaks and carbon monoxide concentration reaches to the alarm setting, the detector LED flashes red and alarm sounds. This product is used in place may produce carbon monoxide.