4 Pcs Boat Barometer Clock Thermometer Hygrometer Weather Station Set Wall Mounting Type Brass for Case for Shell Lightw Hygrometer with Probe App 4 Inches 4 PCS or set Thermometer Hygrometer Barometer Watches Clock Copper for Shell Marine for Weather Station Features: 1.Precision temperature sensing hairspring Precision wet hairspring Precision gear transmission structure barometer movement 1 second precision clock movement Metal pointer. 2.Readings Comparison: The contrast pin on the lens is used to compare readings to see if atmospheric pressure rises or falls over a certain period of for time. 3.Wide Applicability: Generally applicable to ships, factories, laboratories, families. 4.Easy to Install is lightweight and easy to install, suitable for hanging or placed on a . Parameter: Material: brass for shell, plastic bottom for shell, acrylic plastic lens Size(about): thermometer: diameter: 98mm or 3.86in, thickness: 33mm or 1.30in hygrometer: diameter: 98mm or 3.86in, thickness: 33mm or 1.30in barometer: diameter: 98mm or 3.86in, thickness: 36mm or 1.42in timepiece: diameter: 98mm or 3.86in, thickness: 32mm or 1.26in Dial: 0.3mm aluminum sheet printed black on white. Measurement function parameters: thermometer: -30 - 50C, accuracy: hygrometer: 0 - RH, accuracy: 5 percent RH (40 - 70 percent RH) barometer: 950 - 1070hPa, accuracy: 5hpa (980-1040hPa) timepiece: travel for time error is not more than 1 second or day Note: 1.Please allow 1-3mm error due to manual measurement.pls make sure you do not mind before you bid 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package List: 1 xAir pressure gauge 1xThermometer 1xMoisture meter 1xTimepiece Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.