Resolution and refresh rate are one figure, and the switching method is the other · review
MLEEDA four-computer HDMI switch driving two screens, with RS232 control review
A four-computer HDMI switch carrying two screens for each machine, switchable three ways including over a serial line, whose packing list opens with a different maker name.
The bottom line The largest desk on this shelf, and the only unit here that can be driven over a serial line. The audio named in the title and never described, and the maker name in the packing list, are the two questions to put to the seller.
On the listing
A switch letting up to four computers share two screens and four USB devices, in an extending arrangement giving two different pictures or a mirroring one giving two identical pictures; EDID simulation storing the native resolution and refresh rate of the screen so that window positions survive a change of machine; a maximum of 4K at 60 Hz, backwards compatible with 4K at 30 Hz, 2560 by 1440 at 120 Hz and below; four USB 3.0 sockets at 5 Gbit/s, backwards compatible with USB 2.0 and 1.1; three switching methods, panel buttons numbered 1 to 4, a wired remote of 1.5 m and RS232 at 115200 baud, with an indicator light; compatibility given as Windows, macOS, Linux and Chrome OS for desktop, laptop and small-form machines; a note that the supplied 12 V 2 A supply must be connected; and a box containing the switch, four USB 3.0 leads of 1.5 m, a wired remote, the supply and a manual, with a one-year warranty.
Four machines, two screens
Nothing else here covers as much desk. The extending arrangement gives two different pictures, the mirroring one gives the same picture twice, and both are stated rather than left to be discovered. On a two-screen desk this is the whole reason to buy a switch rather than replug leads.
Switched over a wire, or over a serial line
Buttons, a remote, and RS232 at 115200 baud. The third is the unusual one, and it is what puts this unit in a meeting room or on a control desk where the switching is done by a system rather than by a hand.
The word in the title that never comes back
Audio appears once, in the title, among the things shared. No socket type, no channel count, no sentence saying whether it changes with the machine. Everything else on this page is described twice over; this is described once and never explained.
The name in the packing list
The last bullet opens the contents with a maker name that is not the one on the title. It may be a manufacturing label and it may be a mistake, and nothing else on the page explains it.
Before ordering
Ask two questions: which socket carries the audio, and why the packing list names a different maker. Both answers are short and neither is on the page.
Availability
Priced from 106 € to 150 € across the German, French, Italian and Spanish Amazon stores the day this page was checked.
In the American Amazon catalogue with no live offer against it: the reference exists, nobody is filling it.
The British Amazon store returned nothing at all, so the buy button there opens a search in that country rather than a page that would not load.
Every figure in this section is what Keepa held on the day this page was last updated. Stock and prices move without warning.
Prices quoted in this text were read on 10 September 2026. The live price is at the top of the page.
Where it holds up, and where it stops
Strengths
Two screens for each of four machines, with a choice between an extending and a mirroring arrangement, which is the largest desk any switch here covers
Three switching methods, one of which is a serial line, so the unit can be driven by a control system rather than by hand
The EDID simulation holds the resolution and rate of the screen, and the listing states that window positions survive a change of machine
Compromises
Audio is named in the title and described nowhere, so what socket it uses and whether it follows the video is unknown from the page
No video lead is in the box, and a four-machine two-screen desk wants a good many of them
The packing list in the last bullet opens with a maker name that is not the one selling the product, which is a line to have explained before ordering
Specifications
Port count
Four — stated in the title and in the first bullet as up to four computers
Maximum resolution
4K — stated in the title and in the third bullet as a maximum of 4K at 60 Hz, backwards compatible with 4K at 30 Hz, 2560 by 1440 at 120 Hz and below. It is the ceiling of the switch alone; the computers and the screens each impose their own
Refresh rate
60 Hz at 4K, with 120 Hz named at 2560 by 1440 — stated in the third bullet as pairs, which is the form in which the two figures can be read together
Video connector type
HDMI — stated in the title and in the first bullet, with two screens at the output
Screens per computer
Two — stated in the first bullet, where four machines share two screens in either an extending or a mirroring arrangement
USB port count
Four — stated in the title and in the fourth bullet as four USB 3.0 sockets for a keyboard, a mouse and other peripherals
USB generation
USB 3.0, quoted at 5 Gbit/s and backwards compatible with USB 2.0 and 1.1 — stated in the fourth bullet
Switching method
Three — panel buttons numbered 1 to 4, a wired remote of 1.5 m, and RS232 at 115200 baud, stated in the fifth bullet, with an indicator light showing the active machine
Audio support
Named in the title among the shared connections, alongside the USB peripherals and RS232, and described nowhere else — no socket type, no channel count, and no bullet saying whether audio follows the video when machines are changed
Cables supplied
Four USB 3.0 leads of 1.5 m, a wired remote of 1.5 m, a power supply and a manual — stated in the eighth bullet, together with a one-year warranty; no video lead is named among the contents
Amazon reference
B0GKN4F542 (same reference on 5 Amazon marketplaces)
EAN
0760319256191
The questions that come up before an order
What is RS232 switching for on a KVM?
It lets a control system change machines over a serial line instead of a person pressing a button. In a meeting room or a control desk that means the switch can be driven from the same panel as everything else. This listing gives the baud rate as 115200, which is the figure a control system needs to be told.
What does EDID simulation hold?
The identity of the screen, including its native resolution and refresh rate, so that each computer continues to believe a display is attached when the switch is pointed elsewhere. That is what stops windows being rearranged on every change of machine, and this page states it as the reason for the feature.
four computers · one VGA screen · 1920 by 1440 · three USB 2.0 sockets · button or wired controller · four combined leads supplied
A four-computer VGA switch supplied with four combined leads and a desk controller, quoting a resolution above the usual 1080p ceiling and no refresh rate at all.
Best for: A desk running three or four machines on one screen where the switching should happen from the hand rather than from the unit, and where the keyboard is a plain one.
four computers · one VGA screen · 1920 by 1080 · push button only · a hub of uncounted sockets · no refresh rate printed
A four-computer VGA switch worked by a button on the front, whose resolution is printed in a form that leaves no room for a refresh rate.
Best for: A workshop or a back office keeping several older machines on one VGA screen, where a button on the front is the whole interface that is wanted.
four computers · one screen · 8K at 60 Hz and 4K at 144 Hz · HDMI 2.1 · four USB 3.0 at 5 Gbps · panel button or wired controller · four USB leads and an adapter supplied
A four-computer HDMI switch that publishes two resolution and rate pairs, supplies its USB leads and a power adapter, and says outright that the final figure depends on the machines.
Best for: A desk of four machines on one screen where fast peripherals move between them, and where the window arrangement has to survive every change of machine.
