I just want one that tells me the maximum voltage and current supported by a USB C cable.
Got this recently for USD$3 on sale: https://www.aliexpress.com/item/1005006848187940.html
there are several: one that is moderately priced and which I consider myself to buy is the JOY-IT UM120
The Treedix will tell you that, as it is a feature of the eMarker chip (no chip means 60W).