can this operate with only 1 keyboard and mouse, or does it require 2 keyboards/mice to work?

The 4-port KVM matrix can manage 4 computers with two sets of keyboards and mice.

Can you operate this with only one keyboard and mouse, or does it require 2 keyboards/mice ?

You can manage 4 computers with two sets of keyboard, mouse, and two monitors.

Can I use one key board and one mouse to control all 4 PCs?

Yes, you can use one keyboard and one mouse to control all 4 PCs with this HDMI 4X2 KVM matrix.

When you use two monitors from the same device can they be extended or must they be mirrored?

The two monitors can display the same picture or different pictures.

Questions & Answers: 4 Port USB HDMI KVM Matrix 4x2 Dual Monitor 4K @60Hz HDR Switch Splitter 4 in 2 Out HDMI 2.0 Switcher for USB 2.0 Keyboard Mouse PC with Dual Independent Audio, Support Auto Scale, Audio Extractor

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4 Port USB HDMI KVM Matrix 4x2 Dual Monitor 4K @60Hz HDR Switch Splitter 4 in 2 Out HDMI 2.0 Switcher for USB 2.0 Keyboard Mouse PC with Dual Independent Audio, Support Auto Scale, Audio Extractor

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 3.5mm 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 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 etc..

$129^.99 –