COA-2008C Power Source :220V AC Sensitivity : Propane LEL 2.1 Vol% / HEL(UEL) 9.5 Vol% Butane LEL: 1.8 Vol% / HEL(UEL)8.4 Vol% Methane LEL: 5.0 Vol% / HEL(UEL) 15.0 Vol% Power Consumption : 1.7W Operating Temperature : -10oC ~ 50oC Ambient Humidity : Less than 95% RH Horn Level :75 Decibels at 10 feet Standby Mode : Green LED on Alarm Mode : Red LED flashes and an acoustic alarm Type Of Gas Sensed : Natural gas, town gas, LPG SIZE:110mmx69x36mm Weight:270g/pcs PACKAGE size:43mmX110mmX142mm Quantity/BOX:110pcs