Control up to 4 PC or Mac computers from a single keyboard. mouse and monitor and share any USB device between all connected computersThe SV431USB 4 Port rack mountable VGA USB KVM Switch with Hub offers simple control of up to four computers from a single monitor/display and USB peripheral set (keyboard. mouse).The USB KVM switch features an integrated 4 port USB hub. allowing you to share connected USB peripherals between the four controlled PC/Mac computers as though the devices were connected directly.Offering convenient placement and installation options. the KVM switch features a 1U rack-mountable form factor and rear port connection to master and slave computers. allowing you to make the necessary device connections without disrupting your workspace.A cross-platform solution. the KVM switch supports high resolution applications at up to 1920x1440 and provides a smooth operating experience when controlling mixed (Windows/Mac OS/Linux) environments.Backed by a StarTech.com 3 year warranty and free lifetime technical support.The StarTech.com Advantage- Integrated USB 2.0 hub allows the user to share USB peripherals eliminating the expense of duplicate devices- Rugged. solid steel rack-mountable case offers durability even in harsh environments- Absolutely no software or drivers required providing a completely OS independent KVM solution