Safety Guarantee: When the combustible gas (cooking methane/natural gas/camping propane) leakage exceeds the standard, the gas detector will sound a slow, fast, cliff-like 85DB continuous alarm. It cannot detect toxic gases such as CO. Widely used in restaurants, kitchens, hospitals, hotels, oil factories, garages, gas stations, etc. Powerful: The alarm can accurately measure and display the easy-to-read concentrations of combustible gases (0 to 20% LEL), including natural gas (main component: methane), liquefied gas (main component: propane, butane), and town gas (alkanes, olefins, aromatic hydrocarbons). Once the concentration exceeds 3% LEL, it will sound an alarm and flash red. When gas leakage is detected, the alarm will display different alarm status. Durable and Energy Efficient: The plug-in home gas alarm is designed to be powered by A/C, making it super easy and convenient to install. This detector is resistant to mold, insects and corrosion. Made of flame-retardant ABS