4 Port HDMI KVM Switch: This 4 port dual monitor KVM allows you to use a set of keyboard and mouse to control 4 computers, share 3 USB devices and 2 monitors. 4 ports does not mean that it can only be connected to 4 computers. You may have 4 computers currently, or you may only have 2 computers now, but you may need to use 3 or 4 computers in the future, then you can choose this switch. As long as your computer confirms that it supports dual-screen display, you can use 2 screens. | Support Ultra HD 4K Resolution: Our KVM supporting high resolution max up to 4K@60Hz. Note: Only when both your computer Graphics card and monitor support 4K@60Hz then you can get 4K@60Hz effect, so if you want the max resolution you have to check your devices first. And support copy mode and extension mode (requires your computer to have 2 HDMI port) copy mode: two monitors output the same picture, extender mode: two monitors output different pictures. | With Simulation EDID: This KVM dual monitor switch can simulate the EDID of the display, store the resolution and refresh rate of the display, it comes with EDID emulators in each input port, keep PCs always having correct display information. Without EDID, your windows may move around when switching. No longer have to sit and wait for the windows to adjust. Another feature of EDID is the ability to automatically identify the best resolution. | HDMI KVM Switch 4 Ports with 3 USB 3.0 Ports: This 4 computer 2 monitor kvm comes with 3 USB 3.0 ports for sharing USB devices, such as keybaord, mouse, scanners, printers, U disks and more other USB devices, automatically recognize and match various display devices. This KVM Switches also supports a variety of input devices, such as PC, Laptop, PS4, etc. Compatible with a variety of computer systems like Windows 7/8/10/11/Vista/xp, Linux, Mac, and so on. | After-sales Service: This KVM Switch is equipped with 4 USB 3.0 cables and 1 desktop remote control and 1 power adapter. You need to prepare the HDMI cables required to connect 4 computers and 2 monitor. We offer 12 months warranty. Tips 1: If you encounter problems when using the KVM connection, please contact us for after-sales support in time.Tips 2: hotkey switching is not supported.