Looking to secure a detached garage 100' away. Can I add a second base with only cellular?

I want to do something for my detached garage as far as security goes. I have a full ring system in my apartment (the highest tier subscription). Can I add a second base station to my garage if I don't have a network out there and have it communicate just via cellular? If not can it just be a LAN (no internet). ThanksÅ