I bought 3 of these and they all report more or less the same measurements.

Very good cable in terms of charging and overall quality, it seems sturdy with high-quality internal wiring since it is also particularly rigid, just like the very good connection it makes on both sides to any device I tested it with, as you can clearly see in the photos, as it clearly supports most popular charging protocols, but I don't know if it supports OPPO's VOOC/DASH since none of the 4 chargers I tested support it, so I can't know for sure.

It seems to have very low resistance, which automatically means that the quality of the internal cables is excellent.

The mistake, however, is that it is called USB 3.1, while in reality, the speeds it can reach are USB 2.0 speeds.

Tested with https://www.delock.com/produkt/42000/merkmale.html?setLanguage=gr and NVME https://www.skroutz.gr/s/16979333/Adata-Gammix-S5-SSD-512GB-M-2-NVMe-PCI-Express-3-0-AGAMMIXS5-512GT-C.html, where with USB Type-C to USB Type-C USB 3.2 Gen 2 it reaches around slightly above 1200mb/s, with this cable it reaches around 42MB/s, which are expected real USB 2.0 speeds.

I will simply and bluntly describe it as the reason why some USB 2.0 cables like this are called 3.0 or 3.1 is technical because there have been some changes in the architecture of the USB protocol with which "technically", one can say that this cable is USB 3.0 - 3.1 because it can send some of the necessary signals but not the actual speed itself, so some people are fooled.

As reference, the chargers I used for the tests were the following: Baseus GAN2 Pro 100 Watt, GAN2 Pro 120 Watt, GAN 3 Pro 65 Watt, and the original Xiaomi charger that came with my Poco F1 4 years ago.