Product Name: Aneroid Barometer, Atmospheric Pressure (920 to 1050 hPa), Thermometer. Manufacturer: ISUZU Dimensions: Diameter 16.5cm, Depth: 5.5cm Accessories: None. Condition: Minor scratches on the edge of the surface. Some stains. Retail Price: Currently discontinued. I've had this on display for many years, just watching the atmospheric pressure and temperature change with the weather. It seems to function as an aneroid barometer (it showed a low reading during a typhoon, and the thermometer also moves accordingly). Measurement Principle: The circular plate of a metal container inside, which is made vacuum, expands and contracts according to the external atmospheric pressure, and this movement is converted into the movement of a needle to read the atmospheric pressure. Also known as a "vacuum box barometer," it is the most popular type of pointer-type barometer. It is used to measure indoor atmospheric pressure by hanging it on a wall or placing it on a table. The metal frame and classic design are also excellent as interior decoration. You can check the changes in atmospheric pressure with the set needle, which helps to predict the general trend of the weather. To offer the product at the lowest possible price, fragile items will be packaged simply (Yu-Pack) by wrapping them in bubble wrap after protecting them with cardboard. No claims, no returns. This is a used item that has been handled by someone. Please purchase only if you understand and accept that it is not perfect. Please refrain from purchasing if you are sensitive, as it has been stored by an amateur. Thank you for viewing.