Hello C.Rubattel,

It is possible to mount it on a wall. You can find out exactly how this works in the Zyxel User Guide:

ftp://ftp.zyxel.com/LTE3301-Q222/user_guide/LTE3301-Q222_V1.00.pdf

I hope I was able to help you quickly. If you have any further questions, please do not hesitate to contact me!

Greetings Andreas