The Black Box ACX1T-12A-C is a compact, high-versatility KVM/video-and-peripheral transmitter — part of Black Box’s “DKM Compact” (or “ServSwitch DKM”) line — designed to enable remote extension of digital video (DVI-D), USB peripherals (keyboard/mouse/USB HID), audio and serial interfaces from a computer to a remote console or matrix-switch system over CATx cabling (or optionally fiber, depending on system configuration).