Your connections
Each computer connects with its own HDMI cable and its own USB cable. One HDMI cable runs from the switch to the screen.
All switches
AV Access / Essentials
4KSW21-KVM
A simple shared screen.
$54.99 USD
US listing checked November 10, 2026. Out of stock. Taxes, shipping and current availability: confirm with the seller.
Check current manufacturer priceThe connection plan.
- Computers
- 2
- Shared screens
- 1
- Connection
- HDMI 2.0
- Advertised video mode
- 4K at 60 Hz
USB 2.0 peripherals only. Separate HDMI and USB connections from each computer.
Manufacturer specifications, not hands-on test results. Maximum modes depend on the full setup.Pay for what you use.
Is this the right
amount of switch?
Our value assessment interprets the listed connections and use case. It does not establish manufacturing cost, durability or tested performance.
What the price buys
You pay for a narrow, defined scope: two computers sharing one HDMI 2.0 screen at 4K 60 Hz, with USB 2.0 peripherals.
- Worth considering when
- Worth it if you switch between two computers on one screen for everyday work and can run separate HDMI and USB cables from each machine.
- Choose simpler when
- Skip it if you need two screens or 4K at 120 Hz, or need it now: the listing showed it out of stock when checked.
A clearer connection.
Before you decide.
What does the price of the 4KSW21-KVM pay for?
You pay for a narrow, defined scope: two computers sharing one HDMI 2.0 screen at 4K 60 Hz, with USB 2.0 peripherals.
Sources: avaccess.com
When is the 4KSW21-KVM worth considering?
Worth it if you switch between two computers on one screen for everyday work and can run separate HDMI and USB cables from each machine. Skip it if you need two screens or 4K at 120 Hz, or need it now: the listing showed it out of stock when checked.
Sources: avaccess.com
What should I check before buying the 4KSW21-KVM?
USB 2.0 peripherals only. Separate HDMI and USB connections from each computer.
Sources: avaccess.com
Complete your setup.
The switch is one part.
Check the rest.
A connection checklist for the 4KSW21-KVM. Start with what you own.
Inside the box
Not confirmed. Check the exact package contents on the official listing.
Match the exact setup
HDMI and USB cables if you don't already own suitable ones. Peripherals are USB 2.0 only.
Optional upgrade: monitor arms or desk organization, only if your current stands and layout do not meet your needs. Check weight, VESA and desk attachment.
Verify package and connection diagram Explore setup accessoriesKeep exploring.
Other ways to connect.
A starting shortlist. Check the connection requirements before choosing.
AV Access8KSW21-KVM
One screen. Higher refresh.
$159.99 USD
AV Access4KSW21-DM
Two screens, without a dock.
$119.99 USD
AV AccessKD-E10
Your laptop meets your desktop.
$152.99 USDOptional personalization stores a preference and viewed model IDs in this tab’s session storage. This personalization history is not uploaded. Turn it off to clear it. Privacy details