1. Features Detect lPG, natural gas, coal gas, etc. Intelligent mcu control, low power consumption Visual light and audio alarm, capable of switching off valve when detect gas leakage. Installed on the wall, home use only 2. Specifications Alarm Leval: Methane:10-25%LEL Butane:10-25%LEL Dimethylmethane:10-25%LEL Carbon monoxide:2-5%LEL Tolerance:+/-3%LEL Power supply:220v/50hz,110v/60hz Operating condition: Temperature:15c+50c relative humidity: Less than 93% Alarm volume: Over 80db Response time: Less than 20s Recovery time: Less than 30s Dimension:120*75*35mm Price Condition FOB ningbo Origin china Material ABS Size 120 x 75 x 35 Millimeters Weight 150 Grams Packaging 60PCS/BOX Package Size 39 x 26 x 24.5 Centimeters Package Weight 16 Grams Delivery lead time 30day Minimum order 500SET Supply ability 50K/year