USB 3.0 A Female to A Female Extension Keystone Jack Coupler Adapter USB 3.0 keystone insert joins two USB 3.0 or USB 2.0 cables with USB Type A male ends; USB keystone fits a standard opening in a patch panel or wall plate for keystone jacks. Connects equipment with USB ports like a PC, Mac, desktop, laptop, notebook, media player, USB external hard drive, AV receiver or other equipment with USB ports with the cables concealed behind the wall via wall plates. The standard USB 3.0 A port supports data transfer and charging with data transfer rates up to 5 Gbps. The latest version of USB 3.0 is also compatible with USB 2.0 / 1.1. The vertical guide wedge is compatible with the wallboard or patch board at the standard wedge opening. Quick snaps in installation and easily fits standard keystone wall plate