Features: 1. Aluminum alloy outer ring, EU standard movement, knob made of imported aluminum magnesium alloy, PMMA plastic lens, wheel adjustment, function screen, large panel display with dual scale weather change logo 2. Comparing readings: The contrast pin on the lens is used to compare readings to see if atmospheric pressure is increasing or decreasing over a period of time. 3. Wide application: generally applicable to ships, factories, laboratories, families. 4. Easy to install: Lightweight and easy to install, suitable for hanging or placing on a surface. 5. The product is used to measure temperature, humidity, atmospheric pressure and other parameters in the environment. It accurately forecasts future weather changes depending on changes in ambient temperature, humidity and atmospheric pressure. This is a full-featured 6-inch household weather forecast meter. Mechanical Thermometer Hygrometer Barometer, Without Battery Required Parameter: Name: Barometer, Moisture Meter, Thermometer Material: Metal+Plastic Measuring Range: 720-800hPa,-30°C-50°C,0-100% Resolution: 1C, 2% RH, 1hPa Diameter: About 72mm/2.83in Thickness: About 33mm/1.3in Deposition Diameter: 56mm/2.20in Deposition Height: 20mm/0.79in Package Included: 1 * Pressure Gauge 1 * Thermometer 1 * Hygrometer