On a whim, I decided to purchase this one from Amazon.com
https://www.amazon.com/gp/product/B07SBJQBKX/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
What I liked about it was:
-$6? Sure, I'll try it out.
-Charging and audio? I'll definitely need these options in the future.
It took approximately 10 days from China to reach me here in the US, but it works great. The USB-C connector is nice and tight, with a solid click once seated in place. My OnePlus 7 Pro is on OS version 9.5.8 and I've had no issues with OTG settings.
To avoid stressing the USB-C connector, what I've done is:
1.
audio only: insert headphones into adapter first, then attach to phone
2.
charge+audio: insert power into adapter first before headphone jack. Then insert adapter into phone.
So far, I like the item. Works fine, allows me to charge, and was cheap enough that I can buy several to throw into different bags, suitcases etc.
I've attached a pic to show relative size also :good:
Hope this info helps!