"The B004-DUA4-K-R is a 4-Port DVI/USB KVM Switch with audio and USB 2.0 peripheral sharing. It allows you to access, control, boot and reboot four computers from a single USB keyboard, USB mouse, and monitor. Switching between connected computers is quick and simple using keyboard hotkeys or pushbuttons. An independent audio/mic and USB peripheral switching function allows for an uninterrupted experience. A computer can be printing on a printer connected to one of the USB 2.0 peripheral ports, while you listen to audio from and access another computer; all at the same time. The B004-DUA4-K-R uses DVI-I technology, allowing for the transmission of a digital (up to 1920 x 1200) or analog (up to 2048 x 1536) signal. A DVI to VGA adapter, such as Tripp Lite's P126-000, is required for conversion to an analog monitor. Whichever you use, full time DDC support provides the necessary EDID information required for optimal video performance on Windows 7 and other operating systems. Compatible with all major operating systems.- Control 4 computers with a single DVI monitor, USB keyboard and USB mouse- Switch ports via keyboard hotkeys or pushbuttons- Allows for the sharing of audio components between systems; listen to music from one computer while accessing another- Features two USB 2.0 ports for the sharing of USB peripherals (e.g. flash drives, printers, etc.) between the connected computers- (x4) 6ft USB cables and (x4) 1.83 m (6-ft.) DVI + Audio KVM cable kits included- Full time DDC support provides the necessary EDID information for optimal video performance on Windows 7 and other operating systems- Compatible with all major operating systems""- Fast, easy switching via keyboard hotkeys or pushbuttons- Plug-and-play setup - no software required- Hot-swap capability allows easy addition or removal of computers without powering down the switch or other computers- Speaker and microphone connections allow for the sharing of audio components between systems- Supports 2-Channel Stereo Audio- Independent audio/mic and USB peripheral switching function allows for an uninterrupted experience. A computer can be printing on a printer connected to one of the USB 2.0 peripheral ports, while you listen to audio from and access another computer; all at the same time.- Uses DVI-I technology, allowing for the transmission of a digital (up to 1920 x 1200) or analog (up to 2048 x 1536) signal. A DVI to VGA adapter, such as Tripp Lite's P126-000, is required for conversion to an analog monitor.- To connect to a HDMI monitor, a DVI to HDMI adapter such as Tripp Lite's P132-000 is required (Audio is not supported when converting from DVI to HDMI).- Full time DDC support provides the necessary EDID information for optimal video performance on Windows 7 and other operating systems- Supports Microsoft IntelliMouse and the scrolling wheel on most mice- (x4) 1.83 m (6-ft.) USB cables and (x4) 1.83 m (6-ft.) DVI + Audio KVM cable kits included- Compatible with all major operating systems"