The 8-Port USB KVM Switch with On Screen Display (TK-804R) lets you manage multiple computers with just one set of keyboard monitor and mouse. This rack mount device supports USB and PS/2 interface on the console side and USB interface on the PC side. Users can switch between PCs using hot-key push button or On Screen Display for flexible management. Hot-plug PCs quickly to avoid downtime. A maximum of 64 PC connections are supported when you daisy chain multiple TK-804R(s).The 8-Port USB KVM Switch is the perfect choice for managing multiple PC's. -8-port stackable KVM switch with VGA and USB connection to computers.-On Screen Display (OSD) interface for easy management.-Device monitoring with adjustable Auto-Scan audible feedback and cascade up to 64 computers.-Supports most operating systems and advance mouse designs.-8-port stackable USB KVM switch with On Screen Display (OSD).-Console port supports both USB & PS/2 interface.-Supports Microsoft IntelliMouse IntelliMouse Explorer Logitech NetMouse Optical Mouse and other MS compatible mice.-Supports Windows 98SE / ME / 2000 / XP / 2003 Server / Vista Linux Mac OS and more.-High video quality; up to 2048 x 1536 VGA resolution.-Firmware upgradeable via computers serial port.-On Screen Display (OSD) control for easy management.-Adjustable auto-scan via OSD control for monitoring multiple computers.-Keyboards status restored when switching between computers.-LED display for easy status monitoring.-Password protection with auto timeout logout.-Auto-detect bank number when daisy-chaining.-Built-in daisy-chain port for cascading up to 8 levels (64 computers).-Beeping sound for port switching confirmation (enable/disable).-Plug & play and hot-pluggable.-Standard 19 (1U) rack mount design.-2-year limited warranty.