Wow, what a neat little board! After doing a bit of research, it was clear that this thing is designed as an Arduino shield board. I've just ordered one and will install some long pin shield headers on it so that I can stack a TFT LED display on top. I've just been in the process of collecting the parts for the antenna analyzer in the November QST, but this thing does the same thing without having to scrounge up all the parts and build the PCB. What a bargain! And they provide the schematics, board diagrams, and even a tutorial on how to interface it to an Arduino and/or PC. Very cool!