The Light-Link is a USB 3.0 Fiber Optic Cable. Because it uses fiber, it can send the signal instantly with no perceptible latency at much longer distances than regular USB extenders.
Note: The 50 and 100 ft versions of this cable are compatible with devices that are USB 2.0 as well as USB 3.0, but it has to be plugged into a USB 3.0 port in order to function! The 30 ft is currently only compatible with USB 3.0 devices.
How it works
The converters inside the cable heads convert incoming electrical signal into optical on one end, and back into electrical on the other end. The Light-Link is composed of two fiber cables and two copper cables. The copper cables are used for non-data information such as +5v power for USB devices. The fiber strands carry all the data information.
The light travels down the fibers using internal reflection, which allows the light to bounce off the cable walls similar to a bobsled. Light travels extremely fast (186,000 miles a second) so the signal arrives almost instantly without losing any quality.
Eliminates possible points of failure
In a typical long distance USB extension setup, you have many potential points of failure (source to sender, receiver to device, an RJ45 cable in between, and two power adapters for the baluns). The Light-Link extends the signal with zero latency and without having to worry about baluns or power adapters.
Optional Extra power
The Light-Link USB features a micro USB-B port to provide Auxiliary power for devices that require a little more power than usual. (Not required for most devices)
Using with Oculus Quest?
You will need a USB-C cable like this one (Sold Separately)
Works with Oculus Quest and Quest 2.
Does not work with the Valve Index VR Headset
Mfg. Part Number
- SW-33042-30 30 ft.
- SW-33042-50 50 ft.
- SW-33042-100 100 ft.
- Link by Sewell
- Length: 30ft
- Up to USB 3.0 speeds 5Gbps
- Recommended minimum bend radius is about 4 cm when not under tension or about 8 cm when under tension.
Connected to 3.10 USB port and worked right out of the box. 50 ft. USB 3.0 extension to Logitech Brio Webcam. Picture remains clear with very little loss. Full functionality of camera retained using Logitech software for Zooming, color, remote position control. etc. I would recommend. Less work, hassle, expense than USB 3.0 over ethernet.
Both the 50' and 100' fiber cables worked right out of the box!
Bought this cable to work on eliminating conducted RFI. From all I can tell the 30 foot length does indeed carry power from one into the other but no data. There’s no adjustments or switches or calibration therefore I must assume I have either a defective unit or it just doesn’t work.
We're sorry you received a defective unit! Feel free to reach out and set up a refund.
All-in-all, I can't complain about this cable... it does what they said it would do (for the most part). The two drawbacks I'll point to, and why I'm not rating it higher, are that (a) it does not support USB 2.0, and, (b) I could not find any USB 3.0 WiFi adapter that would work over the cable.
In all fairness, the listing makes it clear that USB 2.0 is not supported. I had half hoped that hanging a USB 2.0 device off a USB 3.0 hub might work, but it did not and I do not fault them for that - that's my own ignorance about how the USB standard works. I do, however, fault them for not offering an option that *does* support USB 2.0
The USB 3.0 WiFi adapter thing kind of surprised me. If both the cable and adapter are USB 3.0, I can't fathom why it wouldn't/shouldn't work - fiber is certainly fast enough - too much latency through the analog to fiber converter maybe? But I tried three different adapters (including a relatively expensive NetGear USB 3.0 WiFi adapter) and none of them were recognized by the PC - I tried both direct connect to the cable and indirect via the USB 3.0 hub (yes, I did have external power connected in both cases), to no avail.
I was using this for remote astronomy with my Celestron Advanced VX mount, an iOptron iPolar camera, and three ZWO cameras (one for imaging, one for guiding, and one for the finder scope). The AVX mount and iPolar are both USB 2.0, so they didn't work with the cable - expected and not an issue. However, I had planned to use a USB 3.0 WiFi adapter to connect to the mount and the fact that wouldn't work was a show-stopper. I ended up having to run a second USB 2.0 cable half the distance and use that to get WiFi, but that's not an ideal solution. Ultimately, I've replaced this cable with one from another manufacturer that *does* support USB 2.0
That said, this cable did perform very well with the ZWO cameras even at high frame rates. So long as you are working with USB 3.0 devices and you do not need WiFi over the cable, it's a solid product. Unfortunately, those gaps did make it unsuitable for the task I had, but I am keeping my cable both as an emergency backup and for use on alternate applications.
(Photo shows my telescope setup with my Nikon D850 and a different finder scope camera, but effectively the same)
I bought these without understanding they would not be backwards compatible with usb1/2. I was able to arrange a return with great service even though it was my error and this was clearly stated in the description. I’d have given 5 stars if it did what I needed.