Hello, i want to make an box to keep my wifi router in at my airbnb, so that guests can't tamper with it. the box will be made from wood on the corners and punched metal sheet for the sides (like in the pic bellow)

https://preview.redd.it/tuuwjbdek52c1.png?width=162&format=png&auto=webp&s=1181f04fb3686e8dbbd47f2924956611cdf7b1e4

Assuming that my router is the kind with external antennae and i modify the box to have the antennae on the outside of the metal sheets, am i right to think that i will have no issues with heating and signal reduction ?

Thanks!