Control up to 4 PC or Mac® computers from a single keyboard, mouse & monitor & share any USB (Universal Serial Bus) device between all connected computers Integrated USB (Universal Serial Bus) 2.0 hub allows the user to share USB (Universal Serial Bus) 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 The SV431USB 4 Port rack mountable VGA USB (Universal Serial Bus) KVM Switch with Hub offers simple control of up to four computers from a single monitor/display & USB (Universal Serial Bus) peripheral set (keyboard, mouse). The USB (Universal Serial Bus) KVM switch features an integrated 4 port USB (Universal Serial Bus) hub, allowing you to share connected USB (Universal Serial Bus) peripherals between the four controlled PC/ Mac computers as though the devices were connected directly. Offering convenient placement & installation options, the KVM switch features a 1U rack-mountable form factor & rear port connection to master & 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 1920x 1440 & provides a smooth operating experience when controlling mixed (Windows/ Mac OS/ Linux) environments. Backed by a Star Tech.com 3 year warranty & free lifetime technical support. What’s in the box 4 Port VGA USB (Universal Serial Bus) KVM Switch Rubber Feet Instruction Manual