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. Key Features Control up to 4 computers from a single VGA monitor and USB or PS/2 keyboard/mouse Package includes two 4ft and two 6ft USB KVM cable kits. P756-010 10ft USB KVM cable kits are availabe separately if a longer distance is required. P757-010 PS/2 KVM cable kits are available to connect PS/2 computers. Built-in 2-Port USB 2.0 hub allows USB peripherals to be shared amongst computers connected via USB KVM cable kits Built-in 3.5mm jacks allow for speaker and microphone audio to be shared amongst the connected computers 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 Automatically monitor connected computers via Auto Scan Mode 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 Comes with rackmount hardware that allows for mounting in a 19in rack Comes with a USB to (x2) PS/2 adapter, which allows you to use either USB or PS/2 keyboard and mice to control the connected computers Additional console audio jacks are conveniently located on the front panel of the KVM switch, making them ideal for use with IP phones Supports hot plugging ? computers and devices can be unplugged and plugged in without having to shut down the KVM switch Supports video resolutions up to 2048 x 1536, DDC2B No software or complicated set-up procedures required The KVM switch stores the monitor?s EDID (Extended Display Identification Data) to optimize display resolution Compatible with Windows, Mac, Linux, Sun, UNIX, Novell and DOS 1 Year Limited Warranty Typical Applications Small Office/Home Office (SOHO). Control multiple computers, audio and USB peripherals, and use in either a desktop environment or mount in a 19in rack. Package Includes B006-VUA4-K-R KVM switch (4) USB KVM cable kits PS/2 to USB adapter cable Firmware upgrade cable 19in rackmount hardware External Power Supply (Input: 100-240V, 0.5A, 50/60Hz Output: 5.3V, 2.4A) Owner's Manual