The CS1734B is 4-port KVM switch combined with a 2-port USB 2.0 hub. As a KVM switch, it allows users to access four computers from a single keyboard, monitor, and mouse console. There are three methods to obtain instant access to any computer in your installation: Manual, Hotkey, and OSD 4-port KVM switch with USB 2.0 support and 2.1 surround sound audio One console controls four computers and two additional USB devices 2-port USB 2.0 hub built in USB 2.0 compliant Dual interface - supports computers with PS/2 or USB keyboard and mouse configurations Audio enabled - full bass response provides a rich experience for 2.1 surround sound systems Console audio ports on front panel for easy access – ideal for IP phone users Supports both USB and PS/2 keyboards and mice – configurations available with the included USB-to-PS/2 converter: USB keyboard and mouse; PS/2 keyboard and mouse; or PS/2 keyboard and USB mouse Independent switching of KVM, USB, and audio focus Superior video quality; 2048 x 1536; DDC2B Supports widescreen resolutions Computer selection via front panel pushbuttons, OSD (On Screen Display), and hotkeys Multiplatform support: Windows 2000/XP/Vista, Linux, Mac, and Sun Console mouse port emulation / bypass feature supports full mouse driver and multifunction mice Display Emulation Technology - stores the console monitor's EDID (Extended Display Identification Data) to optimize display resolution Complete keyboard emulation for error-free booting Sun/Mac keyboard support and emulation* Auto Scan Mode for monitoring all computers LED Display for easy status monitoring Easy installation – no software required Firmware upgradeable