ok but...
/!\ be careful, this keyboard has no < and > keys, which is not cool for coding with, especially in HTML /!\.
use on a raspberry pi4 with ubuntu:
add the following boot option to /boot/firmware/cmdline.txt:
"usbhid.mousepoll=0"
otherwise you'll find the mouse a bit laggy!
apart from these inconveniences, the keyboard is pleasant to type on, comparable to an old macbook.