The pH/TDS meter I ordered doesn't test pH! I'm pissed!

[growsomebuds]

I learned that my current pH meter is out od whack, so I ordered another. I also wanted a TDS meter, so I ordered(thought) a combo meter. It only says EC/TDS on the unit. But, in the description it lists pH, and its resolution(.01)
I guess I'm ordering another pen, and the storage solution you fellas are telling me to get.
This is the pen:

https://www.amazon.com/gp/product/B07V2S4KMC/ref=ppx_yo_dt_b_asin_title_o02_s01?ie=UTF8&psc=1