Kramer Electronics VP-450 is a high performance distribution amplifier for computer graphics video signals with resolutions ranging from VGA through UXGA and higher. They take one input, provide correct buffering and isolation, and distribute the signal to four identical outputs. High Bandwidth - 420 MHz (-3dB). HDTV Compatible. ID Bit Control. Advanced Sync Processing - Ensures compatibility with a wide range of computers. Selectable Sync Input Impedance - 75 Ohms (Analog), 510 Ohms (TTL). AC/DC Coupling Selection - Individually for R, G and B signals. Compact Kramer TOOLS - 3 units can be rack mounted side-by-side in a 1U rack space with the optional RK-3T rack. 3ft 15-pin HD Cable Included.