Product usage requirements: 1. Please ensure that both of your computers or laptops have two HDMI output ports and one USB A output port; 2. Please ensure that both of your monitors have one HDMI input port; 3. The KVM switch requires the use of HDMI 2.1-compliant cables no longer than 6 feet in length to ensure proper video signal transmission; Note: HDMI cables are not included in the packaging; please prepare them separately Product connection steps: Connect PC1 to the two HDMI ports on the KVM switch's PC1IN using two HDMI cables, then connect to the USB3.0 port on PC1IN using a USB-A cable; connect PC2 to PC2IN in the same manner as PC1; connect the two monitors to the KVM's OUTA and OUTB ports using one HDMI cable each; connect the power supply to use; Note: Do not use HDMI-to-DP cables or hubs；It is not compatible with MacBooks Dual Monitor KVM Switch: This dual display KVM Switch allows you to use a set of keyboard and mouse to control 2 computers, share 4 USB devices and 2 monitors 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 Stunning Visual Effects: This 8K HDMI KVM switch supports resolutions up to 8K@60Hz and 4K@120Hz, providing an incredible viewing experience with stunningly lifelike images and vibrant colors. It is also backward compatible with 4K60@Hz, 1080P or lower resolutions for compatibility with various HDMI devices HDMI KVM USB 3.0 Switch: In addition to two HDMI ports, this KVM switch also has four USB 3.0 ports with a data transfer rate up to 5Gbp/s, which is 10 times faster than USB 2.0 ports. USB 2.0 devices are compatible. It can be used to share USB devices such as printers, scanners, webcams, wired or wireless keyboards and mice, and more. Use of high-power USB devices requires use of the supplied 12V power supply. Support Windows/Vista/XP and Mac OS, Linux and Unix and other systems KVM Switch 2 Switch Mode: HDMI KVM switch 2 in 2 out supports panel button and external wire controller switching, one key to switch between two signal sources. Note: This dual monitor KVM switch requires your computer to have dual graphics cards (2 HDMI output ports) and support copy, extend mode. If your computer only supports a single monitor, this product will not help you get dual monitor functionality. NOTE: Keyboard shortcuts (hotkeys) toggles are not supported Stable Work: KVM includes 12V power adapter.(the current provided by the PC host is small, and it cannot support USB devices such as hard disks). With the external power design, USB devices can obtain a stable working environment through the switch. If you have any questions during use, please contact us. We have a professional technical team to help you solve your difficulties. Within 12 months,we will replace the switch at no charge 1