Switch between four triple head computers while sharing three dvi displays speakers mic usb keyboardmouse and usb 20 peripherals the sv431tdviua 4 port triple monitor dvi usb kvm switch allows 4 pcs each with 3 dvi video outputs to share monitors 1 microphone and set of speakers 1 keyboard and 1 mouse as well as an additional usb 20 peripheral such as an external hard drive thumb drive printer or webcam the triple dvi kvm switch enables you to switch back and forth between