Great little module to learn soldering, quite easy to build as it has only a few components and a very cute little PCB (far far away from cheap raw common DIY PCBs). It's my first DIY module I've soldered :). Jumper meaning on PCB itself would have been great, as well as more documentation on how to use it, as this module is a lot more than just a learning one, it can be actually useful for various vehicles related display like blinked set of LEDs to improve safety at night. Hope to see more ICStation made modules soon !

Very cheap and it works perfect.

Only missing thing is the description of the jumper block