【HDMI KVM Switch 4 PC Dual Monitor】The 4 port kvm switches allows 4 computers to share 2 displays and 4 USB 3.0 devices. Easily switch between the 4 computers using the remote control or switch buttons on the panel. Supports screen Copy and extension. Note: Each computer must have two HDMI ports.（If the computer or monitor lacks sufficient HDMI ports, use an active adapter） 【EDID Emulation】This 4 port KVM is equipped with an EDID emulation function that automatically emulates the monitor's EDID, meaning that the system quickly recognizes the monitor and does not rearrange the windows on the monitor when switching between computers 【4K@120Hz High Refresh Rate】The kvm switch 2 monitors supports up to 8K@60Hz resolution, as well as 4K@120Hz high refresh rate, providing a truly realistic and vivid display. It is also backward compatible with 1080P@60Hz resolution and more. Note: To achieve the highest resolution, make sure that the source, HDMI cable and monitors all support 8K@60Hz/4K120Hz 【Duplicate and Extended Modes】Windows supports Extended Mode, allowing two monitors on the same computer to display different content. Duplicate Mode: Both monitors show identical content, meeting multitasking or synchronized display needs and easily adapting to office, design, monitoring, and other scenarios 【Two Switching Modes】The dual monitor kvm switch provides two switching modes: 1. Remote Control Switching: Easily switch between different computers using the remote control. 2.Button Switching: Simply press the white buttons for PC1 to PC4 to switch between the computers. Note: Hotkey switching is not supported 【Widely Compatible】The 4 pc dual monitor kvm is plug-and-play, requiring no software drivers, and widely compatible with various operating systems such as Windows, Vista, XP, Mac OS, Linux, and Unix. It supports different input devices such as computers and laptops and can be used in various environments such as offices, conference rooms, and multimedia classrooms. If you encounter any problems during use, please contact us. We have a professional technical team to provide solutions for you