This portable weather station consists of a barometer, thermometer and hygrometer Measure air pressure (hPa), temperature (C) and humidity (% RH) With metric system. Its superiorities include simplicity, reliability and easy reading No special maintenance required during long-term use This analogue weather station is made from high-quality materials Adjust the barometer. Home and kitchen. Maintain normal atmospheric pressure. Get the normal atmospheric pressure from your local observatory or other way. Note: Please hang the weather station in a sufficiently ventilated place to avoid sunlight and corrosive air. Use it in the desired area and do not let it touch water or steam. Avoid violent vibrations and impacts and do not disassemble yourself. Adjust the spiral on the back of the barometer with the adjustment tool and then point to the air pressure you received. The surface needle can be adjusted by hand, can compare the baroque value changed after adjustment. Gently tap against the face to eliminate the friction caused by the gear movement. To avoid loss due to internal components, please adjust the hands slowly. If the adjustment range is large, please adjust it separately several times.