Not saying this device is not cool, but one can also get this info easily in a computer, if you find out what to look for. One had presented a utility here some time ago with a menu bar icon showing this information

https://news.ycombinator.com/item?id=47972511

These PD testers are cool (I thought about buying one), but honestly, for the price of a tester, one can buy 2, maybe even 3 good quality cables and just throw away the rest.

> Reads eMarker chip parameters in Type-C cables, providing detailed performance information (e.g., maximum current, voltage, data transfer rates) to help users fully understand cable capabilities and ensure safe, efficient device usage.

Good thing nobody lies.