?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 need external power adapter, plug and play, it make you work and life easier and simpler. ?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 external switch button. 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. In copy mode the main screen can be copied to the secondary screen. In extend mode, the window from main screen can be dragged to second screen. Please make the setting to your PC before connection, press keyboard key "Windows" + "P" key you can make the setting.