1Designed with headphone jack, can be used in noisy environment and can guarantee the quality and accuracy of detection. 2Sound and light alarm to prevent combustible gas leakage, remind you to be safe. 3The large 16 inches sensor has high sensitivity, provides quick identification and determination of combustible gas leakage location. 4With low battery alarm reminder function to remind you to change batteries in time and insure the detector works normally. 5Handheld design, easy to operate, visual and acoustic alarm can accurately detect gas resources.Features: 1. Designed with headphone jack, can be used in noisy environment and can guarantee the quality and accuracy of detection. 2. Sound and light alarm to prevent combustible gas leakage, remind you to be safe. 3. The large 16 inches sensor has high sensitivity, provides quick identification and determination of combustible gas leakage location. 4. With low battery alarm reminder function to remind you to change batteries in time and insure the detector works normally. 5. Handheld design, easy to operate, visual and acoustic alarm can accurately detect gas resources. 6. An adjustable beep rate helps reduce the density of air pollution. 7. Suitable for industry and home, such as factory and kitchen to detect various flammable gases, such as methane, ethane, propane, butane, alcohol, etc. Specification: Model: GM8800A Detected Gases: Natural gas, liquefied petroleum gas, methane, carbon monoxide, gasoline, hydrogen sulfide, ammonia, and combustible gases. Sensor Size: 16 inches Response Time: 2 seconds Preheating Time: About 60 seconds (25, 60% RH environment) Continuous Running Time: 8 hours (varies with running state) Lower Battery Indicator: 3 0.2V Working Environment Temperature: 0-52 Adjustable Detection Control: Sensor Reset Sensitivity: 50ppm Power Supply: 3 * LR14 1.5V battery (not included) Package List: 1 x Combustible Gas Detector 1 x Accessory Pack 1 x Manual