1. Multifunctional Design: Combined with multiple functions in a single device, the hiking altimeter has a weather forecast, clock, calendar and thermometer, not only an altimeter, but also a barometer. 2. Useful function: the digital barometer thermometer has a larger height display screen and has historical altitude and air pressure recordings of up to 256 pieces, which can automatically measure in about 2 minutes after starting. 3. Accurate performance: with a measuring range of approx. 700 m 9000 m (2300 ft 2950 ft), the portable barometer for hiking is a precise and practical hiking accessory that is able to be accurate with a resolution of 1 m or 3 ft. 4. Special Weather Forecast Design: With an effective range of about 30 50 km (18.642 31.07MI), the digital altimeter barometer is designed to automatically predict the weather conditions after starting and can predict weather conditions in the next 12 to 24 hours.