Including time setting, calendar setting, temperature unit setting, barometer unit setting, altimeter unit setting.In the normal mode, long press the SET button for 2 seconds to enter the setting mode, the setting item will flash, you can press the [ALIIUDE/ ] or [COMPASS/] button to adjust the addition and subtraction, and lightly press the SET button.Digital altitude meter, this product is based on azimuth sensing and air pressure sensing electronic technology, with full-screen digital display of azimuth, direction, clock, temperature, weather forecast, and altitude.-bright backlight, no matter in any environment, you can clearly see the readings on the night crystal display.This digital altitude needle is suitable for outdoor use. The attached rope makes the device more portable in various outdoor sports.Electronic compass1. You need to adjust first to use the electronic compass function. When the device is newly installed with a battery, the screen will display in full screen, and then it will enter the adjustment state. Press the [COMPASS/-] button, and a direction will appear on the screen. The number of angles, but the angle in this direction is wrong.2. Then press and hold the [COMPASS/-] button again until the word'CAL' appears on the screen.