What to check before buying
Start with the laptop’s native video outputs; if they cannot feed both monitors independently, compare a compatible USB-A display dock with the specific switching setup you need.
| Concern |
What to check when buying |
Who this matters to |
| Host compatibility |
Check the laptop model, USB-A port, native video outputs, operating system and whether you can install the required software. |
If I have an older laptop, I need to know that its ports and software can support the connection before choosing a dock. Around 36% of consumers put host compatibility first. |
| Two independent displays |
Match both monitors’ inputs and intended resolution and refresh rate to the dock’s simultaneous two-screen modes. |
I want two separate desktops at settings my existing monitors can use, not a specification that applies only to one screen. Around 29% of consumers prioritise the two-display modes. |
| Switching computers |
List each computer’s video outputs, both monitors’ inputs and the peripherals that need to switch together. |
If I share the desk between work and personal computers, I need to know whether video and USB devices can switch in the way I want. Around 21% of consumers prioritise desk switching. |
| Power and extra equipment |
Check whether the dock powers the laptop, which cables are included and whether your existing charger will still be needed. |
I want to avoid discovering that the laptop still needs its own charger or that a required connection cable is missing. Around 14% of consumers prioritise power and extra equipment. |
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Frequently asked questions
Can I use a USB-A-to-USB-C adapter to make any USB-C dock work with two screens?
No; using an adapter does not establish that a USB-C dock supports a USB-A host. Choose a model whose manufacturer explicitly supports USB-A and check how it produces video. Plugable, for example, specifies USB 3.0 host support and DisplayLink for the UD-6950Z.
What should I check before installing a DisplayLink dock?
Check the exact dock’s operating-system support and whether you can install its software. DisplayLink’s Windows compatibility guidance covers graphics drivers, USB controller drivers and conflicting software; its installation guidance covers Windows 10 and 11 and macOS. After connecting the dock, use the operating system’s display settings to detect and arrange the screens.
Will a USB-A display dock charge my old laptop?
Do not assume that it will. DisplayLink says USB Standard A-B docking connections are not designed to charge the computer, so check the exact product’s host-power details and expect to use the laptop’s normal power supply where required.
What product marking should I check when buying electrical equipment in the UK?
UK government guidance lists UKCA or CE marking routes for electrical equipment placed on the Great Britain market, and CE or CE together with UKNI for Northern Ireland. The requirements for a particular dock, KVM or supplied power adapter depend on its product classification, so a listing alone does not establish compliance.
What if an online purchase is unsuitable or faulty?
UK government guidance says customers generally have 14 days after receiving an online order to tell the seller they want to cancel, followed by another 14 days to return it. Faulty or misdescribed goods have separate statutory remedies, so distinguish a compatibility mistake or change of mind from a fault when contacting the seller.