【Gas Leak Detector】 The ZL73A gas detector quickly and accurately pinpoints gas leaks in hard-to-reach areas for methane, propane, natural gas, LPG, and more. Please allow a 30-second warm-up before use. 【Visual and Audible Alarms】 This detector sounds an alarm upon detecting combustible gases in the air, reacting to leaks within 2 seconds. Nine colored analog bars and an audible alert help you pinpoint the source. (*Detection Range: 50-10000ppm.*) High-precision temperature and humidity sensors ensure accurate readings in various conditions. 【User-Friendly Features】 Enable or disable the auto-off function with the APO button. It automatically shuts off after 5 minutes of inactivity. Mute the audible alarm anytime to eliminate irritating noise. A built-in flashlight illuminates dark areas to locate leaks. A low battery indicator alerts you when power is low. 【Flexible Probe, Easy to Use】 A 24cm flexible probe (bendable in any direction) provides easy access to tight spots like natural gas lines, gas flues, and narrow drains. The screen is clear in all lighting conditions. Portable for indoor and outdoor leak detection. 【What You Get】 1 × ZL73A Natural Gas Leak Detector, 3 × AAA Batteries, 1 × Protective Case, and 1 × Manual. A great gift for anyone using gas appliances, perfect as a stocking stuffer or a thoughtful present.