Hide elements on desktop version

Hi!

Can you please tell me how to hide elements on desktop only.
I now how to set up on mobile with:

@media (max-width: 480px) {
.hide-phone {
display:none !important;
}

I want to hide the Whatsapp en Call button on the big screens:
https://storter.nl/#hoe_je_ons_bereikt

Thanks in advance!

Cheers!