UPDATE HERE: I finally received the Samsung USB-C adapter that I ordered from Samsung's website. Here is my summary: THIS IS JUNK! DO NOT GET THIS. AVOID!!
When I inserted the Samsung adapter into my Note 10+ phone and placed a simple 3.5mm headphone into the adapter, the first thing I noticed is a constant clicking noise every 1/2 second coming from only the right ear bud, nothing from the left ear. As a matter of fact, there is no sound coming out of the left ear phone bud whatsoever, totally zero. I tried another different headphone into the adapter with the same result, clicking noise coming from the right ear piece, no sound at all from the left side. I played music from my MP3 file on my phone, the constant clicking noise was totally rhythmic throughout the right ear piece with no sound at all coming out of the left side. Yes, music did play, but only through the right ear bud along with the clicking noise, but nothing coming out of the left side. I then tried something different. I plugged in my Rode VideoMic Go external shotgun microphone into the Samsung adapter and shot a video of Yahoo news playing on the computer screen. Exactly the same thing happened when I played back the video on my phone, constant rhythmic clicking noise from the right ear bud, no sound at all from the left bud. I notice this adapter doesn't even say the word "Samsung" anywhere. The only word anywhere on this device is the word "Vietnam" and some letters and word on the metal tip of the adapter. This adapter arrived to me by mail from Plainfield, Indiana. Now how do I return this piece of C&#P back to its originator?? Thoroughly disgusted...