The Extech EZ40 Flex Combustible Gas Detector quickly identifies and pinpoints gas leaks. This high sensitivity meter can locate the smallest leaks and provides an audible and visible alarm when levels reach 10% (LEL) Lower Explosive Limit for methane. The EZ40 offers one-handed operation with a 16" gooseneck for easy access into hard to reach locations. Includes three C batteries. See SPECIFICATIONS tab for detailed specs.