HDMI KVM Switch - 4 Computers share 1 keyboard video mouse. any desktop pc with hdmi output like laptop,gaming computer,office pc,network server computer,mini pc can share same keybord monitor mouse,cut costs and keep desktop room clean. USB Switch - Share 4 USB2.0 devices,support usb wireless keyboard mouse,printer,scanner,U disk, portable SSD drive, flash drive.plug & play,drive-free,compatible all os ,windows, dos, mac os, android,kinds of linux.