Barometer: A 3-in-1 function consisting of an outdoor thermometer, a hygrometer, and an analog barometer. The weather station features an accurate analog display of atmospheric pressure, humidity, and temperature, as well as a practical weather trend display, convenient and accurate. Wall-mounted: Lightweight, hanging installation, the back is reserved in the hanging hole, suitable for hanging on the wall or desktop, the appearance of the dial has a clear weather display that is convenient for weather assessment. Fashionable High quality: High-quality aluminum alloy frame ring, made of PMMA plastic, high-quality materials for long service life. Classic and practical. No special maintenance or batteries are required for long-term use. Measuring range: The thermometers in all climate zones are exactly between -30 and 50 C, humidity 1-99% rF, atmospheric pressure 970-1050hPa. Wide range of applications: Analog weather station suitable for indoor and outdoor use. Very suitable for installation in bedrooms, indoor gardens, warehouses, living rooms, offices, etc. Product Parameters: Product: Thermometer, Hygrometer, Barometer Three-in-One Weather Station Item Model Number: THB9392 Measuring Range: 960~1060hPa, -30~50, 0~Rh; Resolution: 1hPa, 1;, 2%Rh Measuring Accuracy: +/-5hPa, +/-2, +/-5%Rh(40~70%Rh) Product Size: Approx. 13 x TH 4.1cm Test Meter Tips: 1. Observe the temperature change: Place it in an environment with a large temperature difference from room temperature for a period of time, and there will be obvious changes in the thermometer pointer. For example: put it in the refrigerator, because the mechanical movement changes slowly, it takes longer to change slowly. 2. Observe the humidity change: You can take a deep breath at the place with a hole at the bottom of the back of the product, and you will clearly see the upward change of the humidity pointer, and the pointer will fall back after a while. 3. Observe the air pressure changes: Due to the different air pressures in different places, the display positions of the pointer are different, and some areas may also encounter the situation where the pointer with very low air pressure is deflected to the lower range and exceeds the range. The air pressure changes more slowly. Generally, the change will be obvious when the weather changes from sunny to rainy or from rainy to sunny. Therefore, if you do not see the air pressure needle moving, please turn the comparison pointer to the same position as the air pressure pointer, and then be patient. Wait a few days. 4. The black pointer is the air pressure pointer, and the silver pointer is the comparison pointer. The function of the comparison pointer can be adjusted in the same way as the air pressure pointer, and then you can compare and watch within a certain time to see if the air pressure has increased or decreased.