Feature: 1. POWERFUL FUNCTION: The gas leak detector has dual mode detection functions of high sensitivity and low sensitivity, which can quickly and accurately identify various combustible gases, such as propane, methane, natural gas, coal gas, gasoline, liquefied petroleum gas, liquefied natural gas, etc. 2. QUICK RESPONSE: The preheating time is only 30 to 45 seconds, and the gas detector enters a high sensitivity mode (50 to 500 ppm), which can detect gas leaks in just 0.5 seconds, making it easy to identify the source of any potential gas leak. 3. EASY TO USE: With a pen style design, easy to carry and use, suitable for various environments such as kitchen gas stoves, water heaters, natural gas heating systems, RV propane tanks, and factory gas pipelines. Diagnose problems by using this multifunctional gas detector. 4. AUDIBLE AND VISUAL ALARM: Gas alarm has a continuous 75 dB alarm sound and LCD light, which can be changed to red to remind users of combustible gas detection. Its green backlit LCD display ensures clear visibility under low light conditions. 5. ABS SHELL: The shell of the detector is made of premium ABS material, wear and scratch resistant, corrosion resistant, ensures a long service life. Specification: Item Type: Combustible Gas Detector Mode: HT61 Material: ABS Battery: 1.5V AAA battery x 2 (shipped without battery) Application: Gas concentration detection Basic Parameters: Sensor: Gas sensitive semiconductor Detection Range: 50 to 1000PPM (methane) Response Sensitivity: Less than 50ppm (methane) Preheating Time: Approximately 30 seconds Response Time: Less Than or Equal to 500PPM: approximately 5 seconds Greater Than 500PPM: Approximately 2 seconds Alarm Mode: Analog display and beep Operating Environment: 0 to 50 ℃, 20 to 80% RH Storage Environment: -10 to 60 ℃, 20 to 80% RH Detection Gas: Acetone, acetylene, ammonia, benzene, butane, ethanol, ethylene oxide, gasoline, hexane, hydrogen, methane, naphtha, natural gas, propane, solvents, etc.. Package List: 1 x Combustible Gas Detector1 x Manual