iogear 4 port DVi KVM with Audio.

Controls 4 USB DVI Computers 2.1 Stereo audio and microphone support Plug-n-Play hot pluggable DynaSync supports EDID to eliminate delay of video resolution when switching Independent hotkey switching between KVM focus, USB peripherals, and audio ports Auto Scan Mode for monitoring all computers LED display for easy status monitoring. DVI resolution up to 1920 x 1200 @ 60Hz Firmware Upgradable; TAA Compliant