The module can measure the air pressure and temperature of the current environment, and you can also converte this signal to a hight information. If you plan to use Xadow to do a wearable device and measure the height when you climb the mountain , then the module will be your only choice. Xadow is a though small but perfectly formed Arduino(TM) compatible board series containing several modules. It's a kit extremely suitable for space-sensitive projects such as wearable devices & arts designs, which have higher request on size, weight and flexible cascade connection. You can find more modules here.Note: This module is not compatible with any other Xadow version 2 or RePhone modules.