Keep Safety-- When the leakage of combustible gases (cooking methane / natural gas / camping propane) exceeds the standard, the gas detector will give out a slow, accelerating, rushing and continuous 85DB alarm. Unable to detect toxic gases such as CO. Widely used for restaurants, kitchens, hospitals, hotels, oil factories, garages, gas stations, etc. Powerful Functions-- This alarm measures and displays accurately an easy-to-read concentration (0~20% LEL) of combustible gas, including Natural Gas (Main Components: Methane), Liquefied Gas (Main Components: Propane, Butane) and Urban Coal Gas (Alkane, Olefin, Hydrocarbon aromatic). It sounds an alarm and flashes red once the concentration exceeds 3% LEL. When gas leakage is detected, the alarm will show different alarm status. Durable and Energy Saving-- Plug-in gas alarm design for home use , powered by A/C, makes it super easy and convenient to set up. This detector is anti-mold, anti-pest and anti-corrosion. Made of flame retardant ABS plastic, easy to clean. It uses