This combustible gas detector is exellent apply on any situation of combustible gas or vapour or residue for pinpointing known leaks, checking for leaks and verifying safety of potential hazardous location. Features: WIDE APPLICATION -- This combustile gas sniffer can be used to detect gas lines and pipe; Propane gas refill station; Fuel in marine bilges; Exhaust and fuel leaks, and check manhiles for safety. 12 INCH FLEXIBLE PROBE -- 12 inch long flexible goose neck probe allows location and detection of leaks in hard-to-reach and confined spaces. PORTABLE INSTANT RESPONSE DETECTOR -- Battery powered handheld gas detector sniffer can be taken to anywhere to use. Auto fast warm-up probe and can give your instant response efficient test. ADJUSTABLE SENSITIVITY -- Increase sensitivity dial to find small gas leaks. Decrease sensitivity to find larger explosive gas leaks while filtering out false alarms from background gas levels. Minimum 50 PPM (methane) AUDIO & VISIBLE LEAKAGE ALARM -- Features 6 LED leak size indicator, pluse with a speaker alarm notify user of gas leaks and relative concentrations of natural gas & propane. Specification: Color: Black + Red Material: ABS Probe Length: 320mm/12.60in Detect Item: Combustible Gas Adjustable Snesitivity: minimum 50PPM Response Time: Instaneous Warm-up Time: < 20S Continuous Operation Time: 9 Hours(sligtly vary with working condition） Supply: 3 * 1.5V AA Battery ( Not Include) Item Size: 159*65*32mm/6.26*2.56*1.26in Item Weight: 186g/6.56oz Packing List: 1 * Smart Combustible Gas Detector 1 * User Manual 1 * Carry Bag WIDE APPLICATION -- This combustile gas sniffer can be used to detect gas lines and pipe; Propane gas refill station; Fuel in marine bilges; Exhaust and fuel leaks, and check manhiles for safety. 12 INCH FLEXIBLE PROBE -- 12 inch long flexible goose neck probe allows location and detection of leaks in hard-to-reach and confined spaces. PORTABLE INSTANT RESPONSE DETECTOR -- Battery powered handheld gas detector sniffer can be taken to anywhere to use. Auto fast warm- probe and can give your instant response efficient test. ADJUSTABLE SENSITIVITY -- Increase sensitivity dial to find small gas leaks. Decrease sensitivity to find larger explosive gas leaks while filtering out false alarms from background gas levels. Minimum 50 PPM (methane) AUDIO & VISIBLE LEAKAGE ALARM -- Features 6 LED leak size indicator, pluse with a speaker alarm notify user of gas leaks and relative concentrations of natural gas & propane.