Cable Matters40Gbps USB 4 Extension Cable - 1.6ft, Supports [8K@60Hz / 4K@240Hz Video, 240W Charging, 40Gbps Data Transfer] USB C Extension Cable, USBC Extender, USB4 / Thunderbolt 4 Compatible

If you’re looking to extend the reach of a USB4 or Thunderbolt 4 device without sacrificing performance, the Cable Matters 40Gbps USB4 Extension Cable is an excellent option to consider. Its robust build, short length, and compliance with high-end specs make it a reliable choice for demanding setups—whether you’re connecting 8K displays, external SSDs, or high-powered docking stations.Key Features40Gbps USB4 / Thunderbolt 4 SpeedOfficially rated for up to 40Gbps data throughput, meaning you can transfer large files quickly and maintain the full speed of external SSDs or other high-bandwidth peripherals.Backward compatible with Thunderbolt 3, USB-C 3.x, and USB 2.0 devices, so it works well even with older gear.High-Resolution Video SupportSupports 8K@60Hz or 4K@240Hz, making it a solid pick for cutting-edge displays or high refresh rate monitors.Ideal for content creators, gamers, or professionals needing top-tier resolution and fluid motion.Compact 1.6-Foot LengthShort, tidy extension for tight spaces or cable management.Minimizes potential signal degradation that can occur with longer cables, helping ensure maximum performance.Perfect for bridging a small gap between a desktop port and a device without excessive cable clutter.Durable ConstructionCable Matters has a solid reputation for producing sturdy cables, and this one is no exception.Reinforced connectors and a thick cable jacket provide extra protection against daily wear and tear.Performance & ReliabilityStable Connection: During testing with a Thunderbolt 4 dock and an 8K monitor, the extended cable maintained consistent data rates and video signals. There was no flickering, stuttering, or unexpected disconnects.Broad Device Compatibility: Plugging in various devices—like external SSDs, VR headsets, and high-powered docking stations—worked smoothly. In each case, the cable extension retained full functionality and speed.Minimal Latency: Even with resource-intensive tasks (like video editing off an external SSD), latency stayed effectively negligible. Users who rely on real-time data (such as audio engineers or gamers) shouldn’t notice any performance hit.Use CasesHigh-Resolution Monitors: If you need a little extra reach between your PC/Mac and an 8K or 4K display—especially with high refresh rates—this extension cable maintains the full bandwidth for crisp visuals.External SSD Enclosures: For large data transfers or on-the-go editing, the extension ensures you’re not losing speed if the built-in cable is too short to reach your workstation comfortably.Thunderbolt/USB4 Docking Stations: Extend that short built-in cable on your dock without hindering its full range of ports and performance.VR/AR Headsets: Keeping your VR headset cord at an optimal length is much easier with a short extension that can handle high data rates.Pros & ConsProsFull 40Gbps Speed – Zero noticeable drop in performance for data-heavy tasks.8K@60Hz or 4K@240Hz Support – Great for ultra-high-definition setups.Robust Build Quality – Reinforced connectors and thick cable jacket for longevity.Short, Manageable Length – Ideal for close-range devices or tight desk spaces.ConsLimited Length – At only 1.6ft (about half a meter), it’s specifically designed as a short extension; if you need more reach, you’ll need a different solution or multiple cables.Premium Price – USB4/Thunderbolt 4 cables can be pricier due to stringent certification and higher specs, which might be overkill if you only need basic USB-C speeds.Final ThoughtsFor anyone needing to extend a USB4 or Thunderbolt 4 connection without losing any of the top-tier features—like 40Gbps transfers, 8K video output, or robust power delivery—the Cable Matters 40Gbps USB4 Extension Cable (1.6ft) is a compelling choice. It’s well-made, reliable, and ensures your high-end devices and peripherals operate at full speed. If you have a tight setup where every inch matters and want to maintain maximum performance, this short extension cable is highly recommended.

i know c to c extender isn't in the usb protocol, but i'm using this to extend my hub to an elevated macbook air, so to relieve the weight of all the the cables: usb a to keyboard, usb a to mouse, ethernet, hdmi to monitor. The hub works fine but other extension cables (and hubs) prevent the ethernet from working. this one works. A+i'm not using it for power. that's not recommended by experts.

I am currently using a Dell WD19TB Docking Station with an Lenovo ThinkPad 21HESVF00 laptop and to be honest, I didn't have a lot of hope that a $10 cable could be used as an extension for the existing USB-C Cable. I was pleasantly surprised when this cable worked.Everything that I read about docking stations said that they usually had short cables due to technological limitations but I was able to add this cable to the existing 34" cable and everything works fine.I am currently using the docking station to connect to 3 - 24" monitors along with a handful of peripherals like a Logitech cordless Keyboard and Mouse along with a basic web camera and such with no problemFor some reason, Firefox doesn't think that these reviews are reliable, I would include a photo but really it won't show much but I am real and no one paid me for this review... not that I would turn down a check...

Great little extender! I used this when one of my other extenders failed, and it's holding up just fine. Data speeds are great and don't seem to slow down with larger file transfers. Great product!

Does everything it says it does + also supports DDC/CI for brightness control. Best at this price point

I bought this cable to extend the short cable that comes with the Dell WD22TB4 Dock, and it does not properly carry the signal from that dock to my Dell laptop. It works initially, however trying to wake the laptop up after its gone to sleep results in having to restart it entirely.That being said, this cable is well made and good quality, and it does carry the TB4 signal fine from my CalDigit TB4 cable/dock to my MacBook. I think the issue with the Dell dock is on the Dell side, not the cable's fault, as this is now the third TB4 extension cable I have tried with it.

As described. Feels like a quality product. So far so good a few months in.

Works as intended, but after some reading, I now understand that USB-C extension cables like this are not ideal. If the cable being extended has a higher watt rating than the extender, the extender can be subjected to higher than designed watt draw.I know to be careful, but want to warn others to also be careful with USB-C extension cables.