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...