Console your Keyboard/Mouse via either way of PS/2 and/or USB arbitrarily. Controls 3 DVI computers from a single console (Keyboard/Mouse) over USB connections. Supports Windows, Linux, Mac OS9/OSX, Sun. Emulates a keyboard on each PC to allow your computers to boot normally without a keyboard error. Supports hot-swap. All devices connected to the KVM can be added or removed at any time, without shutting the unit down. Supports 2 types of switching (1) Hardware Push Button, (2) Hot-Keys on PS/2 and/or USB of keyboard arbitrarily. Supports Auto-Scan function to switch video automatically among computers in preset intervals sequentially. Supports LED display for PC status monitoring. Supports DVI UXGA resolutions up to 1600 x 1200. Supports Beeper during switching enabled. Enabled audio ( Mic / Speaker ). Self powered through PS/2 and/or USB connection. You can also power it through a DC 5 volt power adapter if your computer doesn't have an available USB port. We do not sell the optional power adapter.Fully compliant with the USB 1.1/ 2.0 specification.