The Kramer VP-111 is a high performance line amplifier for VGA/XGA signals. It accepts one input, provides correct buffering and isolation , loops it out to a local monitor or other acceptor, and outputs an amplified and equalized signal to a remote acceptor. Due to its large bandwidth and driving power, the machine can drive very long high resolution lines, (up to 110 meter (300ft.)using good quality cable). The machine provides cable equalization control using a recessed trimmer on the back panel has a switch on the front-panel for input signal termination and a switch on its underside for ID bit control. Video bandwidth exceeding 480 MHz ensures the VP-111 remains transparent even at the highest resolution QGXA modes. It is ideal for remote monitor applications, or presentation systems requiring a local monitor and a large screen display such as a projector at close or remote locations. A 12V power supply is included. Typical applications are dual monitor systems local and remote and presentation systems for remote transmission and cable equalization. You will receive ONE Of the three shown in box. These are new old stock.