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CMSTEDCD GMXUS-SW219S review

The cheapest American listing on this shelf, publishing its resolution and rate as a pair and stating outright the three things it will not do: hotkeys, Mac machines, and an HDMI lead in the box.

Two computers, one screen, $16.99. At that price the interesting question is what has been left out, and this listing answers it three times over without being asked.

The third bullet states in as many words that hotkey switching is not supported. Changing machine is done by the button on the body or by the wired desk controller, which the same bullet suggests letting the unit hide behind the monitor while the controller stays in reach. Two methods, both physical, and no keyboard shortcut — which four listings on this shelf do offer.

The fifth bullet states that the unit is not recommended for use with Mac devices, for compatibility reasons. The sixth states that no HDMI cable is in the package, which contains the switch, a desktop controller, two USB 2.0 cables, a service card and a manual, and that no external power supply is needed because the unit draws what it needs from the computers.

The video ceiling is 4K at 60 Hz, stated in the second bullet as a pair and listed backwards-compatible with 3840 by 2160 at 30 Hz, 1920 by 1080 at 60 Hz and 1920 by 1080 at 30 Hz. That bullet carries two conditions of its own: the HDMI lead must be an HDMI 2.0 one no longer than 3.3 feet, and the computers and the screen must themselves support 4K. The first bullet adds that conversion cables and adapters may give an unstable or flickering picture, or none at all.

The USB side is two sockets at USB 2.0, quoted at up to 480 Mbps in the fourth bullet, which also states that the unit is hot-swappable and that the active machine is shown by color — green for the first, blue for the second. Two sockets is the smallest count published on this shelf among the units that publish one at all.

The sixth bullet closes with a 24-month replacement offer. Three other listings on this shelf state a term — twelve months each, on the AV Access and the two DXchip units — so this is the longest one named anywhere here. At a recorded 60 g (2.1 oz) and 98 by 60 by 16 mm (3.9 × 2.4 × 0.63 in) it is the lightest and smallest of the units here with a recorded weight by a wide margin, and that is what makes hiding it behind the screen a real suggestion rather than a figure of speech.

Prices quoted in this text were read on October 26, 2026. The live price is at the top of the page.

Where it holds up, and where it stops

Strengths

  • The cheapest American listing on this shelf, and the resolution and rate are still published as a readable pair
  • States outright that hotkey switching is not supported, rather than leaving a buyer to find out
  • Twenty-four months of replacement, the longest term named anywhere on this shelf
  • Needs no external power supply, and the active machine is shown by color rather than by a number to interpret
  • Sixty grams and 16 mm (0.63 in) thick, so the suggestion of hiding it behind the monitor is a practical one

Compromises

  • Two USB 2.0 sockets is the smallest count published on this shelf, at the same USB 2.0 generation and the same 480 Mbps as two of the VGA listings here
  • Not recommended for Mac machines, stated in the fifth bullet for compatibility reasons
  • No HDMI lead in the box, and the one to buy must be HDMI 2.0 and no longer than 3.3 feet
  • No audio connection of any kind is named, and two computers is the smallest port count here

Specifications

Port countTwo — stated in the title and in the first bullet as two computers sharing one monitor and one keyboard and mouse set
Maximum resolution4K — stated in the title and in the second bullet as up to 4K at 60 Hz, backwards compatible with 3840 by 2160 at 30 Hz, 1920 by 1080 at 60 Hz and 1920 by 1080 at 30 Hz. The same bullet requires that the computers and the screen support 4K themselves
Refresh rate60 Hz at 4K — stated in the second bullet as a pair, which is the form in which the two figures can be read together, with 30 Hz named at the same resolution as the fallback
Video connector typeHDMI — stated in the title and in the first bullet, which requires an HDMI port on each computer and on the monitor and warns that conversion cables or adapters may give an unstable or flickering picture. The second bullet asks for an HDMI 2.0 lead no longer than 3.3 feet
Screens per computerOne — stated in the title as two computers sharing a single monitor
USB port countTwo — stated in the fourth bullet as two USB 2.0 sockets, for a wired keyboard and mouse or other USB 2.0 devices
USB generationUSB 2.0, quoted at up to 480 Mbps — stated in the fourth bullet, which adds that the unit is hot-swappable and needs no reboot to accept a device
Switching methodTwo, both physical — a button on the body and a wired desk controller, stated in the third bullet, which also states plainly that this switch does not support hotkey switching
Audio supportNot published on the listing — no audio socket, no channel arrangement and no speaker or microphone connection is named in the title or in any of the six bullets
Cables suppliedThe switch, a desktop controller, two USB 2.0 cables, an after-sales card and a manual — stated in the sixth bullet, which also states that no HDMI cable is included and that no external power supply is needed. A 24-month replacement offer is named in the fifth
Amazon referenceB0H5BKH7NN
EAN0684646024356
On Amazon.comAmazon.com had an offer at $17 on October 26, 2026.

Where this unit differs

Put against the median of its own group on this site — not against every network product sold.

  • Maximum resolution4K — stated in the title and in the second bullet as up to 4K at 60 Hz, backwards compatible with 3840 by 2160 at 30 Hz, 1920 by 1080 at 60 Hz and 1920 by 1080 at 30 Hz. The same bullet requires that the computers and the screen support 4K themselves-50 % against the median of this group
  • USB port countTwo — stated in the fourth bullet as two USB 2.0 sockets, for a wired keyboard and mouse or other USB 2.0 devices-33 % against the median of this group

The questions that come up before an order

Can the machine be changed from the keyboard?

No. The third bullet states that this switch does not support hotkey switching. The two methods are the button on the body and the wired desk controller supplied with it.

Does an HDMI cable come with it?

No. The sixth bullet lists the switch, a desktop controller, two USB 2.0 cables, a service card and a manual, and states that the HDMI cable is not included. The second asks for an HDMI 2.0 lead of 3.3 feet or less.

Will it work with a Mac?

The fifth bullet states that for compatibility reasons this switch is not recommended for use with Mac devices.

Against the rest of the network and storage gear

This network and storage gear share the category and the price bracket. Only what each one states is shown; an incomplete column would mislead.

Model Price Port countMaximum resolutionRefresh rateVideo connector type
CMSTEDCD GMXUS-SW219S $17 Two — stated in the title and in the first bullet as two computers sharing one monitor and one keyboard and mouse set4K — stated in the title and in the second bullet as up to 4K at 60 Hz, backwards compatible with 3840 by 2160 at 30 Hz, 1920 by 1080 at 60 Hz and 1920 by 1080 at 30 Hz. The same bullet requires that the computers and the screen support 4K themselves60 Hz at 4K — stated in the second bullet as a pair, which is the form in which the two figures can be read together, with 30 Hz named at the same resolution as the fallbackHDMI — stated in the title and in the first bullet, which requires an HDMI port on each computer and on the monitor and warns that conversion cables or adapters may give an unstable or flickering picture. The second bullet asks for an HDMI 2.0 lead no longer than 3.3 feet
DGODRT KS204V, four-computer VGA switch with a wired desk controller $33 Four — stated in the title and in the first bullet as four computers or laptops managed from one place1920 by 1440 — stated in the second bullet, which adds that a very wide screen is also supported. It is the ceiling of the switch alone; the computers and the screen each impose their ownNot published on the listing — no figure in Hz appears in the title or in any of the five bullets, so the resolution stands without the second half of the pairVGA — stated in the title and in the first bullet, with one screen at the output
DXchip KVM302DP-02 $86 Three — stated in the title and in the first bullet as three computers sharing two DisplayPort monitors and four USB 3.0 devices. It is the only three-computer unit on this shelf8K, given as 7680 by 4320 — stated in the title and in the second bullet at 30 Hz, with 3840 by 2160 at 144 Hz also named and lower resolutions supported. The same bullet states that the sources, the monitors and the DisplayPort leads must all support the figure to reach it30 Hz at 8K and 144 Hz at 4K — stated in the second bullet as pairs, which is the form in which the two figures can be read together. The same maker’s HDMI 2.1 unit on this shelf publishes 60 Hz at 8K and the same 144 Hz at 4KDisplayPort 1.4 — stated in the title and in the second bullet, with two DisplayPort inputs required from each machine and two DisplayPort outputs to the screens
UGREEN AK700, two-computer DisplayPort switch driving two screens $90 Two — stated in the title and in the first bullet as two desktop computers8K — stated in the title and in the second bullet as up to 8K at 60 Hz, backwards compatible with 8K at 30 Hz, 4K, 1080p, 720p and 480p. It is the ceiling of the switch alone; the computers and the screens each impose their own60 Hz at 8K, with 8K at 30 Hz also named — stated in the second bullet as pairs, which is the form in which the two figures can be read togetherDisplayPort 1.4 — stated in the second bullet; the first bullet states in as many words that this switch has no HDMI socket

What separates the models, in network and storage gear

  • If price decides: this model, at $17.

The buyer this one serves, among network and storage gear

Two Windows machines on one HDMI screen, where the switch should cost less than the cable and stay out of sight.

What this one costs among network and storage gear

Details checked on October 26, 2026.

What buyers actually choose

Amazon reports what buyers took in the month before this page was last checked: at least 1,000.

The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.

Sources

Specifications: the manufacturer sheet for network and storage gear and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.

What we look at on this network and storage gear