Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: What is the length of the cable that connects from 4x-hub to the computer-USB-port?
Document: I bought this over six months ago and haven't had a single problem with it. From day one I have plugged it in (power cable and to a port in my Toshiba laptop computer) many times, sometimes disconnecting when I need to be on the road with my PC. I haven't had any issues with anything I have connected to it. Currently have a printer, external hard drive, iPod cable and flash drive connected. All run independently and smoothly.
The only drawback to this product is if your computer will be very far (over 24 inches) from the hub you'll need to buy a longer USB 3 cable (that's what I did). Powered hub performs perfectly and provides USB 3 speeds as promised. Met every expectation.
I was in the market for a hub that would support USB 3.0, and be backward compatible to 2.0. It works perfect in both cases. I find it to be designed well so that there is no loss of ports because they are too close together. I also like the fact that it has an external power supply so that the computer does not have to provide the power through the USB cable. I would highly recommend it to anyone.
I wanted to buy this hub as my USB3 port on the HP desktop faces backwards and difficult to access from the front. Initially the hub had some hiccups but then it seems to be working fine. The speed is not what I expected and I do have a fast USB portable drive and the power is connected. The cable could be a bit longer. The surfaces are not as smooth and one had to push hard to insert the USB drive or cable.
Using an Acer Aspire P3-6820 11.6 Inch convertible (about $500 on Amazon) I was able to build a powerful Windows 8 Media Center. The machine only had one USB port which happen to be 3.0. Using this hub I added a WD My Book 2TB Drive, Using the Cable Matters USB 3.0 to Ethernet dongle I was able to get off the slow Wi-Fi and bring the speed up to well over 100mbps.
The hub works, and the speed is good. Would have been nice if it came with a longer cable, but that might just be for my particular application (computer under desk, hub up on desk).
This KdLinks "USB 3.0 4 port Hub" works wonderfully well and has allows for the simplification of the connectivity mess going into my desktop computer. We are using more USB 3.0 drives and accessories, so I was thrilled to be offered an evaluation unit of this hub for my setup.
It works exactly as you would expect. I really wanted a powered hub so that I could plug devices in it for charging as well. Transfer speeds with USB thumb drives are great. It's very handy to have to add USB 3.0 ports since my computer only had front access to one USB 3.0 port.I would recommend this.
I needed to update my external USB ports and I chose this device. USB 3.0 is the upgrade speed for version 2.0 and if used with a computer or laptop with 3.0 capabilities it is a bit faster. So far this device has been reliable without any failures or problems. I have no complaints and I feel I can rely on it to work good whenever I plug a device into a port.I would recommend this to anyone that is looking for an external USB 4 port hub.
Unit works fine from the moment it was unpacked. It is nice to work with USB 3 speeds now. I just wish it would come with a built in 6ft USB 3 cable for connection to the computer. In the mean time don't forget to buy a USB 3 extension cable such as the one made by Startech.com which seems to be a quality product. Regular USB extension cables will not work for USB 3 speeds. The extension cable must be specially made for USB 3.
Answer: The cable is 1 meter or 39 inches long.