4 Pcs Boat Barometer Clock Thermometer Hygrometer Weather Station Set Wall Mounting Type Brass for Case for Shell Lightw _x000D_ Features: _x000D_ _x000D_ OOTDTY _x000D_ 1.Precision temperature sensing hairspring; wet hairspring; gear transmission structure barometer movement; 1 second clock movement; Metal _x000D_ 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. _x000D_ 3.Wide Applicability: Generally applicable to ships, factories, laboratories, families. _x000D_ 4.Easy to Install is lightweight and easy to install, suitable for hanging or placed on a surface. _x000D_ _x000D_ Parameter: _x000D_ Material: brass for shell, plastic bottom for shell, acrylic plastic lens _x000D_ Size(about): _x000D_ thermometer: diameter: 98mm/3.86in, thickness: 33mm/1.30in; _x000D_ hygrometer: diameter: 98mm/3.86in, thickness: 33mm/1.30in; _x000D_ barometer: diameter: 98mm/3.86in, thickness: 36mm/1.42in; _x000D_ timepiece: diameter: 98mm/3.86in, thickness: 32mm/1.26in _x000D_ Dial: 0.3mm aluminum sheet printed black on white. _x000D_ Measurement function parameters: _x000D_ thermometer: -30 ~ 50C, accuracy: +/- 2C; _x000D_ hygrometer: 0 ~ RH, _x000D_ accuracy: +/- 5% RH (40 ~ 70% RH); _x000D_ barometer: 950 ~ 1070hPa, _x000D_ accuracy: +/-5hpa (980~1040hPa); _x000D_ timepiece: travel for time error is not more than +/-1 second / day _x000D_ _x000D_ _x000D_ Note: _x000D_ 1.Please allow 1-3mm error due to manual measurement.pls make sure you do not mind before you bid _x000D_ 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. _x000D_ _x000D_ Package List: _x000D_ 1 *Air pressure gauge _x000D_ 1*Thermometer _x000D_ 1*Moisture meter _x000D_ 1*Timepiece_x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_