Barometer: A three-in-one function integrating an outdoor thermometer, hygrometer, and simulated barometer. This weather station accurately simulates and displays atmospheric pressure, humidity, and temperature, providing convenient, practical, and accurate weather trend indications. Wall-mounted: Lightweight and portable, with a pre-drilled hole on the back, suitable for wall mounting or office use. The dial clearly displays weather information for easy weather assessment. Stylish and High-Quality: Constructed with a high-quality aluminum alloy frame and PMMA plastic material, ensuring durability. Classic and Practical: No special maintenance or battery replacement required; long-term use is possible. Measurement Range: The thermometer accurately measures -30-50℃, humidity 1-99% RH, and atmospheric pressure 970-1050hPa in all climate regions. Wide Application: The simulated weather station is suitable for both indoor and outdoor environments. Ideal for installation in bedrooms, indoor gardens, warehouses, living rooms, offices, and other places. Product Parameters: Product: 3-in-1 weather station combining thermometer, hygrometer, and barometer; Product Model: THB9392; Measurement Range: 960~1060hPa, -30~50℃, 0~Rh; Resolution: 1hPa, 1℃, 2%Rh; Measurement Accuracy: +/-5hPa, +/-2℃, +/-5%Rh (40~70%Rh); Product Dimensions: Approx. ±13 x 4.1 cm. Test Methods: 1. Observe temperature changes: Place it in an environment with a significant temperature difference from room temperature for a period. The thermometer's pointer will show a noticeable change. For example, placing it in a refrigerator will take longer for the temperature to change due to slow mechanical movement. 2. Observe humidity changes: Take a deep breath through the small hole at the bottom of the product's back. You can clearly see the humidity pointer gradually change. The pointer will fall back after a period. 3. Observe air pressure changes: Due to different air pressures in different regions, the pointer's display position will also vary. In some areas, the pointer may be moved downwards or even exceed the measurement range when the air pressure is extremely low. Air pressure changes are relatively slow. Normally, air pressure changes are more noticeable when the weather changes from sunny to rainy or from rainy to sunny. Therefore, if you do not see the barometer needle move, adjust the comparison needle to the same position as the barometer needle and wait patiently for a few days. 4. The black needle is the barometer needle, and the silver needle is the comparison needle. The comparison needle works similarly to the barometer needle; you can compare and observe air pressure changes over a period to determine whether the air pressure is rising or falling.