Your connections
Each computer needs two HDMI outputs to the switch, plus one HDMI link from the switch to each screen: six HDMI links overall. Each computer also needs the USB upstream connection shown in the diagram to share USB peripherals.
All switches
AV Access / Essentials
4KSW21-DM
Two screens, without a dock.
$119.99 USD
US listing checked November 10, 2026. Check availability. Taxes, shipping and current availability: confirm with the seller.
Check current manufacturer priceThe connection plan.
- Computers
- 2
- Shared screens
- 2
- Connection
- HDMI 2.0
- Advertised video mode
- Dual 4K at 60 Hz
Each computer needs two video outputs. HDMI cables are sold separately on this listing.
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 second screen: two computers sharing two HDMI 2.0 screens at 4K 60 Hz each, with no dock in between.
- Worth considering when
- Worth it for an office desk with two monitors, if both computers have two video outputs and you are fine buying HDMI cables separately.
- Choose simpler when
- Skip it if one screen is enough, or if either computer cannot provide two separate video outputs for the two monitors.
A clearer connection.
Before you decide.
What does the price of the 4KSW21-DM pay for?
You pay for a second screen: two computers sharing two HDMI 2.0 screens at 4K 60 Hz each, with no dock in between.
Sources: avaccess.com
When is the 4KSW21-DM worth considering?
Worth it for an office desk with two monitors, if both computers have two video outputs and you are fine buying HDMI cables separately. Skip it if one screen is enough, or if either computer cannot provide two separate video outputs for the two monitors.
Sources: avaccess.com
What should I check before buying the 4KSW21-DM?
Each computer needs two video outputs. HDMI cables are sold separately on this listing.
Sources: avaccess.com
Complete your setup.
The switch is one part.
Check the rest.
A connection checklist for the 4KSW21-DM. Start with what you own.
Inside the box
The listing says HDMI cables are sold separately and two USB cables are included.
Match the exact setup
HDMI cables, minus suitable cables you already own or that come with the selected package. No dock is built in.
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.
TESmartHKS202-E23
A dedicated dual-screen desk.
$199.99 USD
TESmartDKS202-M24
A high-refresh dual-screen setup.
$329.90 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