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:Approx.17x2.8x3.1cm/6.69x1.1x1.22inch Color: Black Combustible gas detection: 300~10000ppm (reference medium is methane) Response sensitivity: 50ppm Response time: 2s. Preheating time: 30 seconds Ambient-temperature test: Range: -10 ~ 60℃(14 ~ 140℉) Accuracy: 0.1℃ (0.2 ℉) Analysis: 0.1℃(0.2℉) Automatic shutdown: about 5 minutes. Power supply: 2xAAA battery (not included) DIY supplies: electrical appliances With LCD: Yes. Smart-devices: no Gas type: combustible gas Model: X4A Package Includes: 1x Combustible Gas Detector note: ①.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.