The 4-Port USB (Universal Serial Bus) KVM Switch lets you manage four PCs with just one set of keyboard, monitor, & mouse. Switch between 4 PCs with a simple press of a button! Separate sets of KVM cables are included with the KVM Switch, so users can start controlling 4 PCs instantly. The KVM cables also provide power to the KVM Switch, eliminating the need for a power adapter. Hot Key operations provide immediate access to features such as computer switching, & auto-scanning. With its Hot-Plug, & Audible Feedback, the 4-Port USB (Universal Serial Bus) KVM Switch is the perfect choice for managing multiple PCs. Manage up to 4 computers/servers with one set of console devices USB (Universal Serial Bus) keyboard/mouse emulation with 4 sets of detachable KVM cables Compliant with Windows, Linux, & Mac OS High video quality, up to 2048 x 1536 VGA resolution Auto-Scan & LED display for computer monitoring Keyboard status restored when switching between computers Computer selection by front panel push buttons, keyboard hot key commands or Windows-based client switching software* User definable hot key (Windows only) Plug & Play & hot-pluggable USB (Universal Serial Bus) interface power method 2-year limited warranty