Portable Speakers

I never knew that a M F Portable sound system was a thing! I mean, I've heard of portable speakers (especially usb ones and ones that attach to your phone) but not a full on sound system. That would be a great thing to use as I mostly watch/listen to/play games on or through my pc. I also if not using my pc, use my laptops and tablets often. The portable sound system could be used with all of them which is neat!