Feature: 1. Combustible gases, such as methane and natural gas, can be detected. 2. It uses high sensitivity gas sensitive semiconductor and high performance microprocessor. 3. Low power consumption. Long life. Sound and light alarm. 4. Portable, high quality, fashion, constant temperature detection technology using sensitive sensor. 5. Prevent problems before they occur and detect leaks quickly. 6. It is suitable for kitchen gas, canned gas, natural gas, gas pipe network, flange gas station, Specification: Display mode: LED backlight display Inspection range: 50-1000ppm (methane) Response sensitivity: < 50ppm (methane) Sensor: gas sensitive semiconductor Preheating time: about 30 seconds Response time: 500ppm: about 5 seconds; > 500ppm: about 2 seconds Service temperature: 0 ~ 50 C Storage temperature: - 10 ~ 60 C Battery: 2 * 1.5A AA (not included) Shell material: ABS Size: 180 * 30mm/7.08*1.18'' Warm Tips: Check the gas pipe and the fireplace after closing once a week. Especially valve, joint and pipe bending. Please move the detector slowly. If there is an alarm, please move the detector repeatedly. Then, you can find the leak. 1 X Gas Leak Detector 1 X User Manual Note: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. 2. Please allow 1-2cm measuring deviation due to manual measurement.