Including a local transmitter and a remote receiver, the StarTech ST122UTPAL extender allows you to send a VGA video signal, as well as the accompanying audio, over Cat5 (or better) cabling to four monitors (two local, two remote) up to 300m (950ft) away, at resolutions up to 1920x1080. This is great for retail establishments, tradeshows, or point-of-sale applications. A unique control dial lets you toggle displays connected to the receiver on and off, and adjust the 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. So you'll have the power to customize for the optimal picture quality.