Connect two remote monitors in a VGA Transmitter extender application. Works with the 4-port VGA Transmitter (AC555A-4-R2) to extend V GA video up to 500 feet. An equalization (gain) control enables you to fine-tune the picture. Has a 2-kV avalanche diode, which provides greater electrostatic discharge (ESD) protection and more reliable operation. Connects to two VGA monitors.