Built-in sens, detect gas leaks me precisely faster (range: 50 to 1000ppm). This new sens reduces the warm-up time to 28 seconds befe testing f gas leaks such as: Propane, Methane, Natural Gas, Coal Gas, Gasoline, Hexane, Butane, Ethylene Phenoxide, Ethylene Propane, LNG me. Including a lanyard with loop, you can take it with you when you need to detect gas appliances. With this high low mode, accurately quickly find the gas leak point. Turn on the detect in a clear environment, complete the warm-up process within 28 seconds, then click the "Hi" button to find the leak range, then click the "Lo" button to find the gas leak point, the perfect safety tool . When gas leak is detected, the progress bar will turn red display on the 1.1inch HD screen, the alarm will continue to "di di di". When the battery is low, a low battery will appear on the screen. Our gas leak detect will automatically shut off within 5 minutes. 2 AAA batteries with 100and wking hours. Colour:C:White Material:ABS Package Contents: 1set gas alarm detect f home Only the above package content, other products are not included. Note: Light reflection different displays may cause the col of the item in the picture a little different from the real thing. The measurement allowed err is 1-3cm.