specifications: project type: Digital skin humidity detector Working relative humidity: Measurable humidity range: 0 ~ 99.9% Size: Approx. 17 * 3 * 2.3cm/6.7cm x 1.2 inches x 0.9 inches Battery: 2x aa battery (not included) Weight: about 169 g/6 oz Packing list: 1 x digital skin humidity detector Made of high-quality environmental protection materials, durable, safe and durable. Testing can effectively detect skin moisture deficiency, warn skin moisture deficiency, know skin condition in time, and analyze skin condition in time. At the same time, it is recommended to choose skin care products that are suitable for you, and you can test the absorption effect after use. The skin humidity detector is equipped with a very sensitive detector, which is used to accurately monitor skin water and oil content. The digital skin humidity monitor can be used as a tool for beauty salons, beauty salons or families. This test program is easy to use. Turn it on, touch the probe on the skin, and then see the real skin condition on the easy-to-read LCD screen. Night LCD screen. At the same time, specify the humidity of skin, the percentage of oil and elasticity. S7-1200 programmable controller