4 Port USB 3.0 Dual Monitor (HDMI+HDMI ) KVM Switch 4K@60Hz With this 4 port USB 3.0 dual-monitor HDMI KVM Switch (HDMI+HDMI), you can easily control 4 signal sources at the same time, share the same keyboard and mouse, and share 2 monitors.Note: Each input source device must be connected to two dual monitors. Product Features 4 computers share one set of keyboard, mouse, 2 monitors, and more USB 3.0 peripherals.This dual monitor HDMI KVM switch Supports maximum resolution up to 4K 60Hz YUV 4:4:4, HDCP 1.4, HDR 2.2, with EDID Emulator; Dual monitors output support up to 4K@60Hz for extended, mirrored or spliced display（Depends on your computer's graphics card.）;Compatible with Windows 11/10/7/2000/XP/Vista, Linux, UNIX, Ubuntu, Fedora, and other systems;2 Switching modes: Button switch and wired remote.The ports that need to plug in HDMI/USB cables are all hidden behind the KVM, so the desktop doesn't get cluttered;No complicated installation is required, and non-professionals can easily operate it.Independent Audio Microphone output. Support EDID Lock Screen USB 3.0 dual monitor KVM switch can simulate the EDID of the display, when the monitor is switched between 4 computers, the original window order will not change. Installation steps: 1. Insert the DC/5V adapter into the KVM ; 2. Plug the HDMI cable into the KVM and monitor;(Output) 3. Plug the HDMI cable and USB cable into the KVM and your computer/laptop (HDMI cables are not included)(Input) HDMI IN1 A + HDMI IN1 B + USB IN1=PC1 HDMI IN2 A + HDMI IN2 B + USB IN2=PC2 HDMI IN3 A + HDMI IN3 B + USB IN3=PC3 HDMI IN4 A + HDMI IN4 B + USB IN4=PC4 4. Insert the mouse and keyboard into the KVM switch 5. If needed, you can connect a microphone and audio port Note： 1. Most of the reasons why only one video output works is because of an incorrect connection. Please make sure each computer has 2 HDMI cables connected to the KVM. 2. If the KVM switch does not work, you can turn off the switch on the panel and turn it on again after 2-3 seconds, and it will return to normal. 3. Please check the HDMI IN A1 & A2 & A3 & A4, HDMI IN B1 & B2 & B3 & B4 and USB IN1 & IN2 & IN3 & IN4 is corresponding, HDMI OUT A, HDMI OUT B is corresponding, NOT support mixed insertion. 4. Note: HDMI cables are not included USB 3.0 Dual Monitor KVM Support 4K@60HZ Supports high resolution up to 3840*2160@60Hz and downwards.Note: Only when both your computer Graphics card and monitor support 4K@60Hz you can get the 4K@60Hz effect, so if you want the maximum resolution you have to check your devices first.Supports high resolutions up to 3840*2160@60Hz and below.Note: Only if both your computer graphics card and monitor support 4K@60Hz can you get the 4K@60Hz effect. So if you want the maximum resolution, you need to check your devices first. 4 PCS Share 3 USB 3.0 Devices This KVM switch 2 monitors 4 computers with 3 USB 3.0 Ports for keyboard, mouse, printers, USB headsets, or webcams. Supports Separate Audio and Microphone Output This HDMI dual monitor KVM switch comes with a 3.5mm Audio Jack port with a DAC chip inside, which can be inserted into a 3-segment 3.5mm earpiece device, and a 3.5mm microphone interface, which can be inserted into a 3-segment microphone. Dual Monitor KVM Support 2 Switching Modes Quickly switch between the 2 computers with just one click of the switch button on the panel or use the wired remote controller (included in the package).Please note: This dual monitor KVM switch HDMI does not support hotkey switching.