What can I use the ExpressCard slot on my laptop for

INSTALL EXPRESSCARD USB 3 ON LAPTOP expresscard slot EXPRESSCARD34 SLOT · Featured Items · Price · Sold by Newegg · Direct from Manufacturer · In Stock · Free Shipping · Department Filter expresscard_34 slot It also allows me to use the Verizon card on computers that didn't have an ExpressCard slot in the first place such as the MacBook, desktop

fairy slot expresscard slot