EasyFancybox mobile sniffing code?

I’m working on creating a responsive site for a client and have implemented an EasyFancybox lightbox pulling a US map with an image map for selecting a state. works like a charm on any screen large enough to click specifically. I also implemented a basic selector underneath for mobile users, however, I was wondering if there was a way to disable the lightbox if it’s being accessed by say a smaller screen size?

Thanks in advance.

Site is under a specific contract, so send me a message if you’d like the address.