Basicest BAS2150 Freedom 4 Ports Electronic VGA Switch Box KVM Switch Auto USB KVM Easy control of 4 PC with 1 keyboard, 1mouse and 1 monitor Comes with push button, LED display and the buzzer Supports hot plugging and auto scan Compatible with DOS, 98SE, WinNT, Win95, Win98, Win2000, Win3.X, Windows ME, Windows Vista, Windows XP, Window 7, 8, 10, Linux, Unix and NetwareNo External Power Adapter Required Auto USB KVM