Thermometer Hygrometer Barometer with mechanical operation and no batteries required. Ready to use out of the box. - High accuracy pressure reading: ±10 hPa (range 960–1060 hPa) for more reliable weather forecasts. - Contrast needle for easy trend analysis: a second needle on the lens lets you compare current readings with past ones to see whether air pressure is rising or falling over time. - Large, easy-to-read display: clear measurement data at a glance; built to withstand outdoor placement without damage. - Ready-to-use, no liquids or batteries: mechanically operated barometer for home use; comes pre-calibrated and immediately usable. - All-in-one instrument: combines thermometer, hygrometer, and barometer for temperature, humidity, and pressure readings in one unit. 2-3 practical use scenarios - Home weather planning: monitor local pressure trends to anticipate approaching weather and plan outdoor activities or protect delicate items. - Outdoor outings: camping, hiking, or boating benefit from pressure trend notes to anticipate weather changes. - Greenhouse or workshop monitoring: keep an eye on temperature, humidity, and pressure to support plant health or equipment conditions. This device emphasizes function, durability, and ease of use, offering a compact, reliable solution for measuring temperature, humidity, and atmospheric pressure without the need for power sources.