Multi-Gas Detector, Product Type Multi-Gas Detector, Display Screen Type LCD, Housing Color Yellow, Gas Detected Carbon Monoxide, Combustible Gas, Hydrogen Sulfide, Oxygen, Temperature Code T4, Alarm Setting Carbon Monoxide (Alarm 1 - 35 ppm, Alarm 2 - 50 ppm), Hydrogen Sulfide (Alarm 1 - 10 ppm, Alarm 2 - 15 ppm), LEL (Alarm - 10 Percent, Alarm 2 - 20 Percent), Oxygen (Alarm 1 - 19.5 Percent, Alarm 2 - 23.5 Percent), Battery Life 2 yr