UR24C without a computer?

Basically the title. I sometimes want to use it as a “mixer” when I want to jam on my synth without having to open up my computer. Is this possible? If not, are any of the older mid range (UR22 etc) support this feature as well? I checked online but couldn’t find the right info.

Thanks

Yes you can plug your synth and hear it on the Phones output.