The Evertz 2408RGBT-A2KM-USB is a transmitter module designed for extending digital (DVI) or analog (RGB) video signals over fiber optic or coaxial cables. It is part of the 2408 series, which offers various options for different signal types and applications. This particular module, with the "USB" designation, likely indicates an additional USB port for control or data transfer, though specifics are not detailed in the search results.