【One Set Of Keyboard & Mouse Control 4 PCs Share 2 Monitors 】This Dual Monitor HDMI KVM help you control 4 PCs share 2 monitors (Extend display mode or copy display mode) by only one set of USB keyboard & mouse, under the condition of your computers or laptops support multi-display or dual display. If your computer has only one HDMI output, you can use a converter or conversion cable, such as VGA to HDMI converter or conversion cable, DVI to HDMI converter or conversion cable, etc. | 【Ultra HD 4K Visual Enjoyment】This small & exquisite kit supporting high resolution max up to 4Kx2K@30Hz, and also supports 3D and 1080P@60Hz or other lower resolution (Downward Compatible). Support most wireless keyboard and mouse (or mechanical keyboard) on market, plug and play, no extra power adapter required. Note: Only when your sources and monitor support 4K@30Hz then you can get 4K effect, so if you want the max resolution you have to check your devices first. | 【Support 2 Modes Switching】1. Buttons switching；2.Hotkey Switch：Use hotkey switch need to insert the keyboard and mouse into the HDMI dual monitor KVM K/M USB ports on the panel（Hotkey switch: Scroll Lock+ Scroll Lock+ 1/2/3/4 or Ctrl+Ctrl+1/2/3/4）.Note: when you insert the keyboard and mouse to the USB 2.0 port, it will not support hotkey switch, you can only using button switch under this condition. | 【High Compatibility, Match Various Devices】This HDMI Dual Monitor KVM has 2 USB 2.0 ports for sharing USB devices, such as scanner and USB printer or U-disk etc. It can identify and match various display devices automatically. Also capacitate itself supports many kinds of input devices or signal sources, such as PCs, Laptop, PS4, PS3 etc. Compatible with a variety of computer systems. It can be widely used in various fields, such as education, finance, studios, offices, software development, etc | 【Important notes】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. If your computer only supports single display, then this product cannot help you get dual display function. Our products include 8 HDMI cables, 4 USB-B cables, and 1 mini USB charging cable. When using the product, please make sure that all cables are connected tightly, and make sure that all cables are good.