Digital Barometer Altimeter, Hiking Barometer, Altimeter for Hiking, Electronic Altimeter, Multifunctional Barometer, [Practical Function]: Comes with historical altitude and air pressure data up to 256 pcs, Digital Barometer Thermometer has a larger altitude display screen, which can automatically measure in about 2 minutes after booting. [Accurate Design]: Portable Barometer for Hiking has a measurement range of about -700M - 9000M (-2300FT - 2950FT), can be accurate with a resolution of 1M or 3FT, an accurate and practical hiking accessory. [Distinct Weather Forecast Function]: Designed to automatically predict after booting, Digital Altimeter Barometer can forecast weather conditions for the next 12 to 24 hours, with an effective range of about 30-50 km (18.642-31.07MI). [Versatile Purposes]: A perfect device for various outdoor activities, Digital Altimeter Hiking is specially designed for outdoor use, can be hung on your backpack or belt. [Multiple Functions]: Altimeter for Hiking comes with a weather forecast, clock, calendar, and thermometer, combined with multiple functions in a single unit, not only an altimeter but also a barometer.