Documents and meetings together
If you want a document open alongside references or a video call, an external screen can give you room to keep those windows visible. Microsoft describes this as a use for connecting a monitor to a laptop.
Who a second screen may suit
Limited-space laptop workers
If your desk is compact, consider the screen’s size and the space its stand takes up, as well as where the display can be positioned. Which? includes smaller screens among options for limited spaces.
Colour-conscious creators
If you work with images or video, compare the monitor’s resolution and documented colour coverage with the needs of your workflow. Which? identifies graphic design as one use for larger monitors.
What to check before buying
Start with the screen arrangement you want and your laptop’s documented display support. Then check how the monitor, connection and available desk space fit that setup.
External monitor
Consider it when: you want more room for documents, references or meetings beside your laptop screen.
Trade-off: screen size, resolution, stand and any built-in hub need to fit your desk and connection needs.
Separate dock
Consider it when: you need to connect a display and several peripherals through one dock.
Trade-off: a dock adds another device, and its sockets do not increase the laptop’s own display limit.
Cable or adapter
Consider it when: a direct connection can link your laptop to one compatible external screen.
Trade-off: it does not add a dock’s peripheral connections, and USB-C video support depends on the devices.
| Concern | What to check when buying | Who this matters to |
|---|---|---|
| Space for work windows | Compare screen size and resolution with the documents and applications you use. Microsoft describes keeping a document visible alongside references or a call on another screen. | If I want documents and meeting windows visible together, I’ll prioritise usable screen space; around 28% of consumers put that need first. |
| Connection compatibility | Check the laptop’s exact ports, supported display count and intended resolution. Plugable notes that USB-C Alt Mode needs support from both connected devices; Apple says a hub does not raise a Mac’s maximum display count. | If I need the screen arrangement to work with the laptop I already own, I’ll check its exact display support; around 22% of consumers prioritise compatibility. |
| Desk fit and positioning | Check the screen’s footprint and stand adjustments against your workspace. Which? discusses smaller monitors for limited spaces; Ergotron says its LX Slim Clamp arm folds aside, but fit depends on the exact mount and desk. | If desk space is tight, I’ll consider the monitor base and how I can position the screen; around 22% of consumers put desk fit first. |
| Charging and peripherals | Check the laptop’s charging requirements, cable capability and the connections you need. Dell specifies up to 90W for the P2425HE and CalDigit specifies up to 98W for the TS4; these are maximum product capabilities, not a guaranteed charging rate for every setup. | If I want to connect charging and peripherals conveniently, I’ll compare a hub monitor with a separate dock; around 17% of consumers prioritise that convenience. |
| Creative-work display needs | Match resolution and documented colour coverage to your workflow. BenQ states 99% sRGB and 99% Rec.709 coverage for its PD2705U; those manufacturer specifications do not establish suitability for every colour workflow. | If I work with images or video, I’ll look for documented coverage that matches what I deliver; around 11% of consumers put creative-work display needs first. |
Common setup mistakes
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Choosing USB-C video by socket shape alone
A USB-C connection needs the relevant video support from both the laptop and the connected device.
Check the exact laptop specifications and the monitor, cable or adapter’s supported connection before ordering.
An unsuitable cable or adapter may need replacing.
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Assuming dock sockets mean more independent screens
A dock does not automatically increase a laptop’s display limit, and Microsoft says a splitter duplicates a signal rather than creating independent extended screens.
Confirm the laptop’s supported display count and the intended extended-display arrangement.
Some outputs may not work for the screen arrangement you intend.
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Treating maximum charging wattage as guaranteed
The charging rate depends on the laptop, power source and cable, not only the maximum shown for a monitor or dock.
Compare your laptop’s charging requirements with the source and cable capabilities.
You may need a power-capable cable or to keep using the laptop’s charger.
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Choosing a monitor arm by range name alone
Ergotron’s LX variants have different mounting arrangements, and its Top Mount C-Clamp page marks that variant discontinued.
Check the installation instructions for the exact mount and make sure your desk can accommodate it.
A different mount or placement arrangement may be needed.
Relevant brands to consider
These examples relate to specific monitor, dock and mounting products; they are not endorsements of every product from each brand.
Dell
Relevant for USB-C hub monitors, including the P2425HE and U2723QE.
- Dell UK specifies up to 90W power delivery and stand adjustments for the P2425HE.
- Dell UK currently lists the U2723QE as unavailable. Check the exact model’s current availability and specifications.
BenQ
Relevant to creative workflows through the PD2705U, a 27-inch 4K monitor.
- BenQ states that the PD2705U covers 99% sRGB and 99% Rec.709.
- These are manufacturer specifications, not independent measurements, and do not establish coverage of other colour spaces.
CalDigit
Relevant when a laptop setup needs a separate multi-port Thunderbolt dock.
- CalDigit specifies 18 ports and up to 98W charging for the TS4.
- Features depend on the host device; CalDigit’s UK page states that original M1 Macs do not support dual displays.
Ergotron
Relevant to desk arrangements where a monitor arm may suit the available mounting space.
- Ergotron describes its LX Slim Clamp arm as folding aside to reclaim workspace.
- Check the installation requirements and current status of the exact variant; the Top Mount C-Clamp page marks that product discontinued.
Related Joybuy products
These Joybuy choices include external monitors and a USB-C dual-HDMI dock for laptop home-office setups. Check your laptop’s video support before choosing a display connection or dock.
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MSI MD272UPSW 27-inch 4K UHD Smart Monitor with Google TV
A 27-inch 4K display to consider if you want more screen space for home-office work.
USB-C 65W; Dolby Audio; Multi-Control.
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ASUS ProArt PA24ACRV IPS QHD
A QHD external display to consider when screen detail matters; check that your laptop supports DisplayPort Alt Mode before relying on USB-C video.
IPS; QHD.
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ASUS ZenScreen MB249C IPS USB-C
A USB-C monitor to consider for adding a screen to a laptop setup; verify that the device supports DP Alt Mode for USB-C video.
IPS; USB-C.
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Targus USB-C Universal Dual HDMI 4K Docking Station, 100W Power Delivery pass-through
A separate dock to consider if you need multiple connections alongside an external display; confirm your laptop supports the intended display arrangement.
Dual HDMI; up to 100W Power Delivery pass-through. Laptop support is required for the USB-C Alt Mode connection and dual-display arrangement.
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iiyama ProLite XUB2792UHSU-B6 27-inch 4K UHD monitor
A 27-inch 4K monitor to consider if you want additional screen space for documents or creative material.
27-inch; 4K UHD.
Frequently asked questions
What should I check on my laptop before ordering a monitor?
Check the exact model’s video ports, supported external-display count, resolution and refresh rate. For USB-C Alt Mode, Plugable says both connected devices need support; if you want charging through the screen or dock, compare your laptop’s charging requirements with the cable and power source.
Will a dock let any MacBook Air run two external monitors?
No. Apple says the supported number depends on the Mac model and each display’s resolution and refresh rate; a hub does not increase the Mac’s maximum display count. Check your exact MacBook Air model rather than relying on the dock’s number of sockets.
Does a USB-C port mean my laptop can send video to a monitor?
Not by itself. Plugable’s guidance says USB-C Alt Mode requires support from both the laptop port and the connected device, so check the specifications for the exact laptop and monitor before choosing a cable or adapter.
Will a monitor or dock’s advertised wattage guarantee laptop charging?
No. KTC explains that the negotiated charging rate depends on the display or dock, laptop and cable. Compare their documented capabilities with your laptop’s charging requirements.
How can I extend my Windows desktop onto another screen?
Microsoft’s troubleshooting guidance says to press Windows key + P and select Extend. If the monitor is not detected, check the cable and connections, then isolate docks, dongles or adapters before assuming the monitor is faulty.