Features: Measurable Gases Types (partial list): Can detect a of gases, methane, natural gases, ethanol, gases, propane, benzene, ethylene oxide, hexane, n-butane, acetylene. Sensitivity Adjustable: High and low sensitivity adjustable, you can high sensitivity to sense the general ranges, and then choose low sensitivity to accurately determine the air leakage point. Sound&Light Alarm: Sound and light prompts, when detecting combustible gases sink leakage, the meter beeps, the backlight will turn to red, and the concentration simulation bar increases. Multifunctional Design: with low battery indicator, data hold, automatic shutoff, on/off test, and auto clear function. Wide Applications: Suitable for water heating device detection, gases pipeline detection, industrial waste gases detection, gases pipeline detection, oil station operation, gases leak detection, etc. Specifications: Name: Combustible Gases Detector Battery: 2 * 1.5V AAA battery (not included) Display: color LCD disply with backlight Sensor: gases-sensitive semiconductor sensor Test ranges: 50-1000PPM Response sensitivity: Less than 50PPM Response time: Less than 500PPM about 5s, 500PPM about 2s Detecting gases: combustible gases Test Gases (partial list): ethanol, propanol, acetylene, ammonia, benzene, methane, alkane, propane, butane, epoxy butane, gasoline, emulsion gases naphtha natural gases, paint thinner gases Use environment: 0-50, 20-80%RH Storage environment: -10 to 60, 20-80%RH Material: plastic colour: black Package Contents: 1 x Gas Detector 1 x English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.