Portable Gas Detector senses potentially dangerous propane, butane, acetylene and natural gas leaks. Lightweight, pocket-size detector emits an audible alarm when even low amounts of gas are detected. 3-stage LED indicator warns if gas level is low or high. Perfect for checking gas leaks in pipes, fittings, valves, storage tanks, grills, appliances and hot water heaters. Includes protective cap and user’s guide. Uses 2 AA batteries (not incl.). 7-1/4" L.