This white keystone insert coupler allows you to convert back and forth between a USB 2.0 type A female plug to a type B female adapter - attach any USB 1.1 or 2.0 cable with ease. This reversible adapter is designed to use with all keystone-style wall plates and standard USB 2.0 cables. It is housed in high-impact ABS resin (acrylonitrile butadiene styrene) and is UL 94 V-0 rated. This USB 2.0 connector's shell is made from copper alloy and is plated with nickel -expect exceptional performance with this coupler's contacts that are made from phosphor bronze, plated gold and nickel.