The EXT-VGA-AUDIO-141 extends VGA 1920 x 1200 resolution and analog audio up to 330 feet (100 meters) over one CAT-5 cable. The VGA Audio Extender utilizes a sender and receiver methodology to connect the extended workstation to the computer. Simply connect the sender unit to your computer using the cables provided. Then connect the receiver unit to the display and speakers. CAT5e cables, sold separately, then connect the sender unit to the receiver unit. Both the sender and the receiver units must be connected to a power supply. When fully powered and operational, the units efficiently extend video, audio and control signals.