Features: Combustible gases, such as methane and natural-gas, can be detected. It uses high sensitivity gas sensitive semiconductor and high performance microprocessor. Low power consumption. Sound and light alarm. Prevent problems before they occur and detect leaks quickly. Portable, high quality, fashion, constant temperature detection technology using sensitive sensor. It-is suitable for kitchen gas, canned gas, natural-gas, gas pipe-network, flange gas-station,etc. Specifications: Material:ABS Size:As Picture Shown Range:0-1000ppm Detecting gas:combustible gas Sensitivity:<50ppm(methane) Response Time:<2 second Warm-Up Time:Approx. 30 second Display: HT60 LCD-disply;HT59 Concentrator-indicator Alarm mode: audible and vibration Package Includes: 1x Combustible Gas Detector note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.