Keystone jack - usb 2.0 a female to a female coupler flush type - white the usb 2.0 female to female modular setup could be used for computer data transfer, usb devices, external hard drives, etc.By running your wires in the wall, your setup will be clutter-free and relieved from eye-sores.Here’s an in-depth look at the specifications of this usb keystone jack: allows usb cables to be passed through panels, enclosures and wall plates connector a: usb a female on the front connector b: usb a female on the back snap-in usb keystone module gold plated color: white