JAHLGT Gas Detector VC829A Four-in-one Gas Detector, Combustible, Oxygen, Carbon Monoxide, Hydrogen Sulfide High Volume Alarm & LCD Digital Display

O color screen display, friendly and rich interface. O There are two language options, Chinese and English. O can measure the concentration of four gases at the same time: oxygen (O,),-carbon oxide (CO), Hydrogen sulfide (H2S), combustible gas (LEL) O has three types of alarms: sound, light and vibration. O has data and playback functions, and can record up to 120,000 data continuously. O has a charging function.