Mine is OPPO S9K, which is quite easy to use.
Actually, it's all the same, really.
There is nothing to introduce.
That is, S33 is a new function, which is a little stronger than other functions in OPPO. Of course, the price is a little more expensive. The last time I saw it was 799.
As for S, how much is it?
This is the function and performance.
There is nothing special about the sound quality and function of other brands.