Nerdonic says it is tiny but powerful as though we shouldn't have both in one development system. The Exen Mini is both powerful *and* tiny. It is a fine feat to put a Zero/Cortex M0+ into such a small module. I have a few designs which I'm re-implementing on the Mini -- all of which will perform better in a now smaller space. Very cool. The construction quality is good too -- well recommended!
Excellant Buy using boards for my drones trackers just in case one goes a wandering, only one small cravat documenation link is missing on web site,but you dont really need it as a nice little pinout guide comes with them. all around a good product.