Caution: color: we shlp according to the color of the first picture, in the package: if the quantity is not stated in the description, we will shlp the item according to the quantity and model in the title. Mayilon pen type portable gases detector combustible leakage detecting tool audible alarm function methane propane gases leakage detection home safety detector for all kinds of combustible gases the product is shlpped based on the color or size of the main image of the product page. This mayilon pen type portable gases detector can detect all kinds of combustible gases like methane, propane, natural gases and so on. With this tool, you can rapid and reliable detect of combustible gases leakage on the gases pipeline, come on and try it, it will not let you down. Features: with lcd display screen, you can see the data more clearly, give you a better using experience. Small in size and easy to carry, pen type suitable for you take it with you to anywhere you want to use it. Auto power off function: if there are no operation and measurement signal, the machine will auto power off after about 10 minutes, which can save the energy. Audible and visible alarm function: when the detector detects combustible gases, the number of simulation bars will increase with the increase of gases concentration, the beeping sound will also be faster with the increase of gases concentration. It is easy for you to use, you do not need to spend much time on learning how to use it, save your time. Specifications: material: abs sensor: gases-sensitive semi-conductor power: 2 * aaa battery batteries not included reaction ranges: >50ppm methane reactions time: approx. 5 Sec 500ppm alarm mode: visible and audible operating conditions: 0~50, 20~80%rh storage conditions: -10~60, 20~80%rh package size: 215 * 55 * 45mm / 8.5 * 2.2 * 1.8In package weight: 103g / 3.6Ounce note: the detecting parameters only for methane. The parameters are only for reference for the detection of other combustible gases. Packing list: 1 * gases detector