The ST122UTPAL VGA and Audio over Cat5 Video Extender (long range) lets you extend a VGA video signal, as well as the accompanying audio from a single PC over Cat5 (or better) cabling to 4 (2 local, 2 remote) monitors. The VGA (and audio) extender is a complete solution that includes both the transmitter and receiver, and features a unique control dial to toggle displays connected to the receiver on and off, and adjust audio volume. The control wheel can also be used to help fine tune your signal by offering RGB (Red, Green, Blue) SKEW calibration, as well as control of gain and brightness. Extending video distances up to 300m (950ft), the transmitter offers an EDID copy feature that delivers optimal resolutions and increased compatibility with the remote displays, making it a versatile solution for digital signage and point-of-sale applications. Backed by a StarTech.com 2-year warranty and free lifetime technical support.