... ,Sound&Flash alarm Independent carbon monoxide alarm,carbon monoxide detector,CO alarm,CO detectorwith LCD display Japan electrochemical sensor Operating voltage: 120 ... &Flash alarm; Alarm level: >400PPM CO between 4-15 minutes;>150PPM CO between 10-50 minutes;>70PPM CO between 60-240 minutes;Drivable ... auto-check indicatorDimension: 118.5*82*43mm . Execute criterion:GB15322 CO alarm,CO detector