Hey Keno,
This is similar to the type of product I’m working on:
https://www.google.com/search?q=eurorack+modules&safe=off&rlz=1C1CHBF_enUS731US731&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjhqtusivjTAhVR8mMKHcCkBmoQ_AUICygC&biw=1920&bih=950
So typically, these do not have any kind of a screen. Since these devices are often handed from one person to the next, permanent labeling seems appropriate.
Let me know your thoughts…
C.