This product is a gas leak detector, used to quickly and reliably detect combustible gas leaks on gas pipelines, with a wide range of applications, it is an indispensable tool for every professional. Features: Multiple Gases Detection: This portable gas leak detector can detect a large number of flammable gases, like CH4, methane, natural gas, gas, propane, ethanol, gasoline, alcohol, etc. Detection Range: Approximately 300 to 1,000 ppm (based on methane), instant response once encounter leakage points. Flexible Probe Easy to Use: With a 8.5-inch flexible gooseneck( bendable in any direction), the portable gas leak detector makes it easy for you to access hard-to-reach areas, such as natural gas pipelines, propane storage tanks, gas fireplaces, sewers, basement, RV, and other narrow space.  Alarm Mode: When the detector detects combustible gas, the number of simulation bars will increase with the increase of gas concentration. The beeping sound will also become faster as the gas concentration increase. Easy to Use: The preheating time is about 30s, it will automatic measure after 30s. The meter will shut down automatically if the concentration is not measured within 5 minutes. Specifications: Material: ABS Sensor: Gas-sensitive semi-conductor Detection Range: 300-10000PPM Reaction Range: less than 50PPM (methane) Warm-Up Time: Approx. 30sec Reactions Time: less than 500PPM: Approx. 5sec more than 500PPM: Approx. 2sec Alarm Mode: Analog bar display, beep and vibration (vibration function can be selected according to model) Operating Conditions: 0 celsius ~50 celsius 20~80percent RH Storage Conditions: -10 celsius ~60 celsius 20~80percent RH Power Supply: 2 * 1.5V AAA Alkaline Batteries (Not included) Item Size: 150 * 30 * 26mm 5.91 * 1.18 * 1.02in Item Weight: 131g 4.62oz Package Weight: 224g 7.90oz Package Size: 22 * 9 * 4.5cm 8.66 * 3.54 * 1.77in Package List: 1 * Gas Leak Detector 1 * Storage Bag 1 * User Manual (English)