Multifunctional digital altimeter: it has the functions of weather forecast + temperature meter + altimeter + compass + barometer + clock + level indicator + calendar. High accuracy altimeter: the principle is to measure the difference in height by the sensor detects the change of atmospheric pressure. Clear LCD display with electronic backlight: with 5 seconds blue backlight with high brightness. Weather forecast and time function: forecast weather conditions in 24 hour format from 12 to 24 hours. With 4 kinds of weather conditions: sunny, half sunny, cloudy, rainy. Features: Multifunctional digital altimeter: it has the functions of weather forecast + temperature meter + altimeter + compass + barometer + clock + level indicator + calendar. Altimeter with high accuracy: the principle is to measure the height difference by detecting the change of atmospheric pressure. Clear LCD display with electronic backlight: with 5 seconds blue backlight with high brightness. Weather forecast and time function: predict weather conditions in 24-hour format from 12-24 hours. With 4 kinds of weather conditions: sunny, half sunny, cloudy, rainy. Easy to use: a simple device to provide the necessary and accurate information for outdoor enthusiasts.