This 2x2 Dual Monitor KVM provides you with great flexibility in integrating cross-platform computer equipment easily. It can simultaneously output the HDMI and DP signal of 1 PC to 2 HDMI monitors, or you can optimise the HDMI signal of 2 PCs to output to 2 displays.You can control the Dual Monitor KVM with the front-panel button, IR remote control and keyboard hot keys. The 2x2 Dual Monitor KVM supports only a set of keyboard & mouse and 2 monitors to control 2 PCs. Supports hot keys to change active selected PC. Supports USB 2.0, you can even attach USB 2.0 hub , USB drive, printer, barcode scanner or other USB devices to the Dual Monitor KVM. And supports keyboard and mouse pass through mode to improve KM compatibility. 

• Using only 1 set of keyboard, mouse and 2 monitors to control 2 computers.
• Support Unix /Windows /Debian /Ubuntu /Fedora /Mac OS X /Raspbian /Ubuntu for Raspberry Pi and other Linux based systems.
• Support hot plug, connect or disconnect devices to the KVM at any time without turning off devices.
• Support front panel button, IR signals, keyboard hot keys to control the KVM.
• Available to use keyboard and mouse without any delay after switching computer.
• Support resolution up to 3840*2160@60Hz.
• With extra standard USB 2.0 port, it is possible to connect barcode scanner, USB hard drive or other USB devices to the KVM.
• Support keyboard and mouse pass through mode to improve KM compatibility.

Support Unix /Windows /Debian /Ubuntu /Fedora /Mac OS X /Raspbian /Ubuntu for Raspberry Pi and other Linux based systems.

• 1 * 2x2 HDMI+DP Dual Monitor KVM Switch
• 1 * DC 12V Power Adapter
• 2 * DP Cables
• 2 * KVM (HDMI+USB) Cables 
• 1 * IR Remote Control
• 1 * User Manual 

Yes, this Dual Monitor KVM Switch can realize:
- Two monitors display the information of two computers at the same time,
- Two monitors display the information of the same computer. One of the two monitors can be either a copy screen or extended screen.

From the perspective of signal transmission you must connect two video cables to the KVM, and both output ports of the KVM need to be connected to a monitor.

No, you can't. Dedicated mouse & keyboard ports should not be used for other types of USB devices. You can connect a powered USB hub to the USB 2.0 interface to expand the number of USB2.0 ports, and connect your USB devices to the USB Hub.

Yes, but you need to pay attention to:- If connected to one of the two dedicated mouse & keyboard ports, it can be used normally;but the remaining port(is also set up specifically for keyboard and mouse) cannot be used for other USB devices.- If you connect it to that extra standard USB 2.0 port, you will not be able to use keyboard hotkeys.