The keystone snap-in modules provide a full range of solutions for voice, home networking, home office, audio/video & more. With the wide selection of snap-in modules, you can custom-configure your keystone wall plates & patch panels for greater control & more flexibility. Use this coupler for one USB (Universal Serial Bus) Type A male cable connector & one USB (Universal Serial Bus) Type B male cable connector; just snap it into patch panels, compatible wall plates & surface boxes.