Amazon oil pressure test kit?

[James9100]

Anyone have experience with one of the $35 oil pressure test kits from amazon? Any specific recommendations?
This is the one I’m looking at, just wanna make sure I’m not getting 100% garbage.
Prokomon Oil Pressure Tester https://www.amazon.ca/dp/B086VYDQC6/?tag=tjforum-20

 

[voodooridr]

I have one very similar to that one (probably from the same chinesium factory) I got from Amazon and it seems to work fine