Swallow house 4 Port USB HD KVM Matrix 4X2 Dual Monitor 4K@60Hz HDR Switch Splitter 4 in 2 Out HD 2.0 Switcher for USB2.0 Keyboard Mouse PC with Dual Independent Audio

1. This HDMI-compatible 4X2 KVM matrix, it can switch between 4 input signal source devices, and distribute the signal to 2 monitors (2 monitors can display the same picture or different pictures) and any one output All ports can realize independent audio output through Optical SPDIF or 3.5 mm audio jack. ^^2. 4-port KVM matrix can manage 4 computers with two sets of keyboard, mouse and two monitors, and supports various devices with HDMI-compatible interfaces. ^^3. Support HDMI-compatible 2.0 and HDCP 2.2. The resolution is up to 4K @ 60Hz (RGB/YUV 4:4: 4), allowing you to enjoy a fantastic visual feast. ^^4. Equipped with 4 USB cables, to solve your troubles of buying USB cables, support 3 switching modes, button switching, remote control switching, keyboard switching. ^^5. This HDMI-compatible 4X2 KVM matrix is suitable for entertainment centers, retail and websites, high-definition TV set-top boxes, DVDs, projector factories, data center control, information distribution, meeting rooms, schools and corporate training environments. ^^6.
Question: Does the 4X2 device support dual video extension function? The 4X2 KVM device itself cannot be extended with dual video, and your computer needs to support the extension function. For example, if the computer has an expansion card installed, it will support dual video expansion, thank you. (Note that the computer needs to have a computer expansion card installed)