Tripp Lite 4-Port DVI/USB Desktop KVM Switch with Audio & Cables (B004-DUA4-K-R) Fast, easy switching via keyboard hot keys, push buttons or software (not required) Plug-and-play setup - no software required Hot-swap capability allows easy addition or removal of computers without powering down the switch or other computers Speaker and microphone connections allow sharing of audio components between systems (standard 3.5 mm audio connections) Supports 2-Channel Stereo Audio 3-year limited warranty