Tripp Lite's B006-VUA4-K-R is the optimal solution for controlling multiple computers, audio and USB peripherals, and can be used in either a desktop environment or mounted in a 19in rack. Connect up to 4 USB computers with the included 4 USB KVM cable kits, or use P757-010 PS/2 KVM cable kits to connect PS/2 computers. Built-in 3.5mm jacks allow for speaker and microphone audio to be shared amongst the connected computers. Also built-in is a 2-Port USB 2.0 hub, which allows for the sharing of USB devices amongst computers connected via USB KVM cable kits. KVM console, Audio and USB can be switched independently of each other - Control one computer while listening to audio from a second computer and printing to a USB printer from a third. Switch the focus of KVM, Audio and USB functionality using pushbuttons, OSD, hotkey commands, auto scan mode or the mouse switching function. The mouse switching function allows focus to be switched between ports by double-clicking the scroll button on a scroll mouse. The on-screen display(OSD) provides two levels of security, with 1 Administrator account and up to 4 User accounts, and can be displayed in English, Japanese or German. It supports video resolutions up to 2048 x 1536, and features a compact design that does not require software or complicated set-up procedures. Compatible with Windows, Mac, Linux, Sun, UNIX, Novell and DOS.