Who this setup suits

Desk workers using a USB scanner

You want two separate external work areas while keeping a USB data connection available for scanning. The starting point is whether your laptop can drive both screens through a USB-C video hub or needs another display route.

Users of older or port-limited laptops

If your computer has USB-A or lacks the required USB-C video capability, a compatible DisplayLink dock may provide display connections alongside ports for the scanner and other peripherals. It also requires supported software.

Mac users needing separate external screens

Check your exact Mac model’s display support and the dock’s macOS display mode. Apple says supported external-display configurations depend on the Mac model, resolution and refresh rate; some two-output USB-C hubs mirror content on macOS.

What to check before buying

Decide how the laptop will drive two separate screens, then check that the scanner has a compatible downstream USB data port and an adequate power arrangement.

USB-C video hub

Choose it when: The intended laptop port supports the hub’s required video mode and the laptop can drive your two-screen configuration natively.

Check carefully: Two video sockets do not establish independent display support; Anker says its A210B mirrors content across external monitors on macOS.

DisplayLink dock

Choose it when: A compatible USB-A or USB-C connection is needed because the laptop’s native video route does not meet the two-screen requirement.

Allow for: Compatible DisplayLink software, plus a separate laptop charger if the chosen dock does not provide laptop charging.

Concern What to check Who this matters to
Two separate screens Match the laptop and dock’s stated dual-display mode to both monitors’ inputs, resolution and refresh rate; confirm extension rather than mirroring. I need different work on each screen, not the same picture twice. Around 42% of consumers put usable dual-screen output first.
Laptop and OS compatibility Check the exact host port for DP Alt Mode if the hub requires it, or confirm DisplayLink software support for the chosen operating system. If my laptop has limited video output or I use a Mac, I need to know which connection and display mode will work. Compatibility comes first for around 33% of consumers.
Scanner ports and power Match the scanner cable to a downstream USB data port; check the dock’s power arrangement and its stated laptop charging output if charging matters. I need the scanner to remain connected while both screens are in use, especially if it draws power through USB. Roughly 25% of consumers prioritise the scanner and peripheral connection.

Common buying mistakes

  • Assuming every USB-C port carries video

    A USB-C connection alone does not establish DP Alt Mode support, so a hub’s display outputs may not receive a video signal from that laptop.

    Check the laptop manufacturer’s specification for the intended port, or assess a DisplayLink dock and its software compatibility.

  • Counting two HDMI sockets as two independent desktops

    Display behaviour depends on the computer, operating system and hub. Anker states that its A210B mirrors the same content across external monitors on macOS.

    Check the exact Mac model’s supported display configuration and the hub’s macOS display-mode statement before buying.

  • Reading charging input as laptop charging output

    A hub can use some of its input power itself, leaving less available to the laptop.

    Compare the stated power delivered to the laptop with its charging requirement, and check the charger and cable conditions for that rating.

  • Overlooking power for USB peripherals

    A scanner that draws power through USB may behave unreliably if the connection cannot supply what it needs.

    Check the scanner’s power requirements and the dock’s power arrangement. If a scanner is unreliable through the dock, test it directly on the computer to help isolate the connection.

Relevant brands to consider

Targus

Targus offers dual-display docks with USB peripheral connections, including DisplayLink models.

  • Targus specifies the DOCK116GLZ for dual HD displays, two USB-A data ports, one USB-C data port and up to 80 W power pass-through.
  • Its stated two-screen mode is dual HD; compare that limit with both monitors before choosing it.

StarTech.com

The DK30A2DH is a DisplayLink dock specified for USB-C and USB-A host connections.

  • StarTech.com specifies two 4K 60 Hz display connections and six downstream USB-A ports for this model.
  • StarTech.com states that the DK30A2DH does not provide USB-C Power Delivery to charge the laptop.

Anker

The A210B is a compact USB-C hub for a compatible host that provides the required video connection.

  • Anker specifies two HDMI outputs up to 4K at 60 Hz, two USB-A data ports, one USB-C data port and up to 85 W laptop charging for the A210B.
  • Anker says Windows can show different content on its external monitors, while macOS mirrors the same content across them.

Joybuy products

Related products coming soon.

Frequently asked questions

Can any USB-C hub run two separate monitors and a scanner?

No: the laptop and hub must support the required two-screen mode, and the hub needs a downstream USB data port that matches the scanner. A USB-C video hub may require DP Alt Mode on the laptop; a compatible DisplayLink dock is another route but requires its software.

What should Mac users check before choosing a dual-monitor hub?

Check the exact Mac model’s supported external-display configuration and the hub’s stated macOS display mode. Apple says display support varies with the model, resolution and refresh rate; Anker states that its A210B mirrors content across external monitors on macOS.

How do I arrange the screens after connecting a dock to Windows?

Open Settings, then System and Display to identify and arrange the connected screens, as described by Microsoft Support. If a screen is not detected, check its connection and the dock’s compatibility with the laptop.

Why might a scanner stop working through a dock?

A connection or power issue is one possibility, particularly for a USB-powered device. Test the scanner directly on the computer, then check its cable, the dock’s USB port and whether the setup needs external power.