Actually it's a little bit of both. Some devices use an an audio stream that is encoded kind of like a normal digital audio signal where the bits go up in the encoded audio when you turn up the volume and so does the output. Other devices send a full level audio signal and send a separate control signal which tells the device to turn the volume up or down. If you push the volume button on the receiver and it shows the volume on the source (your phone) going up or down in sync with it, then it's the latter.
I was at a theme park a little ago and really in need of a cup of coffee. So I strolled into their Starbucks sponsored coffee shop because that's all there was. And sure enough, they were advertising various drinks, coffees, with protein added.
If you still need some DDR4, I can sell you my old set of 64 GB G. Skill RAM. I swapped it out for Corsair just so the RGB would match my other stuff. I'm not looking for a huge profit.
Edit. I read that wrong. Looks like you ordered some last week.
Anker makes a cheap vertical mouse that works pretty well for me. I would suggest trying that first because it will take time to get used to.
If you are willing to spend a little more, the Evoluent vertical mouse absolutely beats everything I've tried in terms of comfort. I bought an older model on eBay because I didn't want to spend a lot. The only problem with the Evoluent is that the button your middle finger is under is the middle button and your ring finger is the right click. If you can remap the buttons, then it would be hands down the best option. Unfortunately, not everyone can install stuff to remap buttons on their work computer.
What kind of RAM? DDR4? I can sell you old G Skill DDR4.