Features: Portable Combustible Gas detectors quickly identifies leaks of natural gas, methane with accuracy for home/industrial safety. ABS device features preheating alerts, concentration indicators strips, and adjustable sensors head for precise gas leak detection. Essential for homeowners, maintenance technicians, and safety inspectors requiring combustible gas monitoring in residential or commercial space. Detect gas leaks near pipelines, kitchen appliances, HVAC systems, or confined industrial areas using this lightweight analyzers (batteries not included). Preheats within second, activates alarms through escalating LED indicators when detecting LEL combustible gas. Specifications: Detection ranges: 50-1000ppm(methane) Response sensitivity:<50ppm(methane) Response time:5 second (≤500ppm)or 2 second (>500ppm) Power supply: 2xAAA battery requires (NOT Include) Operating environment: 0 to 50℃/50 to 122℉, 20%-80% Storage environment: -10 to 60℃/14 to 14℉, 20%-80% Color: White/Yellow/Black Package Includes: 1pc sniffer note: 2xAAA battery requires (NOT Include) Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.