$40 is above my own "give it a try" threshold, $10-$20 maybe.
Just got a $13 China-shipped "Chromecast" was nothing like as such on delivery. But .... $13 poorer and some wisdom. For $40.... I would suggest a higher level of reviews, evidence, proof.
The good part of Anker is if they claim it one thing, and it proves to be another, they make you good in the end. Free replacement, no shipping back cost, etc.