해발고도측정기 정확한고도계 (기압 고도계, 고도속도계)

✔ Main Features
＊The altitude above sea level is displayed.
＊The air pressure at the current position is displayed.
＊Support both horizontal and vertical modes.
* Displays the altitude speedometer.
＊Altitude record is displayed in a graph.
＊Speed ​​record is displayed in a graph.