What USB4 is
USB4 is the latest major version of the USB standard, the technology behind the ubiquitous connections used to link devices, transfer data, and charge gadgets. USB4 brings significantly faster data speeds and more capability than previous versions, and it runs over the modern USB-C connector. It also aims to unify and simplify USB, which had become confusing, bringing more consistency to what a USB connection can do.
Built on USB-C
USB4 uses the USB-C connector, the small, reversible oval plug now common on phones, laptops, and many devices. USB-C is the physical shape, while USB4 is a standard describing the capabilities running over it. This means USB4 benefits from USB-C's convenience, like being reversible and able to carry data, video, and power, while delivering a higher tier of performance through that same familiar connector.
What it improves
USB4 offers much faster data transfer than older USB versions, making tasks like moving large files or connecting high-performance devices quicker. It can also handle video output to displays and carry power for charging, all over one connection. By combining high-speed data, video, and power capability in a single standard and connector, USB4 makes a USB-C port more powerful and versatile than before.
The relationship with Thunderbolt
USB4 is closely related to Thunderbolt, a high-performance connection standard that also uses USB-C. USB4 was developed drawing on Thunderbolt technology, so the two are compatible in important ways and share the connector and much capability. In practice this means more devices can achieve high-speed connections, and the lines between the standards have blurred, part of the broader effort to make fast, capable USB-C connections more universal.
Why it matters
USB4 matters because USB connections are everywhere, and a faster, more capable, more unified standard improves a technology we all rely on. It helps reduce the old confusion around what a given USB port or cable could do by raising and clarifying the baseline. As more devices adopt USB4 over USB-C, connecting, charging, and transferring data gets faster and more consistent, which is why understanding it is useful.
The bottom line
USB4 is the latest USB standard, delivering faster speeds and more capability, data, video, and power, over the modern USB-C connector, while aiming to simplify a once-confusing landscape. Closely related to and compatible with Thunderbolt, it raises the baseline for what a USB-C connection can do. Understanding it explains the fast, unifying standard behind today's most capable USB-C ports.
Related on Skillo
See also: What is USB-C? Explained, What is Thunderbolt? Explained.
Sources
Published date reflects the original event date (2026-10-23). This article is original Skillo editorial written from the sources above; facts were verified in September 2026.
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