?Ultra HD 4k Visual Enjoyment?This dual monitor switch can support resolution up to 4K@30Hz (3840x2160) YUV 4:4:4, downward compatible with lower resolutions. Support wired /wireless/mechanical keyboard and mouse. Powered by USB cables, no external power adapter required. ?Support DVI To HDMI converter?If your computer only with one HDMI output, you can use a converter or conversion cable, for example DVI to HDMI converter or conversion cable. Not recommend VGA to HDMI converter or conversion cable because it's poor compatibility. ? With 4 USB 2.0 USB Ports?This 2 in 2 out KVM switch with extra USB 2.0 port for sharing mouse, keyboard, USB printers, scanners, etc,. Compatible with a variety of computer systems,such as Windows 10/7/2000 / XP / Vista,Linux,Unix,Ubuntu,Fedora, etc. Mac not recommend because of it’s poor compatibility with KVM switch. ?Support 2 Mode Switching?Support physical button and wired control. Only when your computer supports dual display or multi display, you can use this product to achieve two computers to share two monitors, extended mode or copy mode. Please swap the output A and B if output B no display. ?Dual Monitor KVM Switch?This Dual Monitor HDMI KVM can control 2 PC share 2 monitors by 1 set of USB keyboard & mouse. When in copy mode the main screen can be copied to the secondary screen. When in extend mode, the window from main screen can be dragged to second screen.