【Protect Yourself】-- The gas detector is primarily used to detect natural gas (main components: methane), liquefied petroleum gas (main components: propane, butane), and urban coal gas (alkanes, olefins, arenes). When the flammable gas leak exceeds the standard, the gas detector will emit a continuous slow, accelerated, or rapid audible alarm at 85 dB. It cannot detect toxic gases such as carbon monoxide. 【Digital LED Display and Audible Warning】-- The gas detector's display shows 0 under normal conditions. When a flammable gas leak is detected, the numbers 1 to 9 and the letter A can be displayed on the screen. The alarm will sound and flash red when the concentration exceeds 3% LEL. The alarm will enter different alarm states depending on the flammable gas concentration. 【Durable and Energy-Saving】-- Standard EU plug design, plug and play, no converter required, making installation extremely simple and convenient. This detector is mold, pest, and corrosion resistant. Fireproof ABS