i think i can help...nop thats not the goal of this adapter, this is an exclusively usb mouse adapter
, other usb devices are not compatible with it.
This question has been already answered in the original news post: (the original text its in portuguese, but you can translate it on the left side bar)
In retromania.pt: (google translated)
"The adapter is 100% domestic manufacture and is based on Cocolino, working only with USB mice."
"This adapter is not designed to compete with the RYS or Jerry, they dont fit underneath the plug compartment of a atari st and
substantially cost twice as much."