As I use headphones and the lead really needs changing because it is crackling. I thought I would use my Sony headphones as it has Bluetooth support. I purchased one of these. Which turned out to be a total POS.
https://www.ebay.co.uk/itm/403841546250
It comes with this version of driver BRLink_V_1.1.0.21 Which simply does not allow me to turn on the Bluetooth. Ironically something popped up there was a update to driver BRLink_V_1.1.0.29. However this file does not exist anywhere because the manufacturers site seems to have taken it down. I went through every link on Google trying to find the file and ultimately gave up. Most of them were just broken links in Chinese.
Later I find version BRLink_V_1.1.0.31 Which installs and allows me to turn on the Bluetooth however it intermittently disconnects every few seconds and it just refuses to stay connected. Spent the usual two hours of searching trying out various things which are all pointless or not relevant.
So I give up with the thing. Just like every other cheep piece of hardware out there is, it's just total garbage. Annoying thing is as well that even when it is working the volume is incredibly low despite everything been turned up to 100%. I spent two hours yesterday looking into that problem and there is no solution to that either.
The amount of time I spent messing around with this thing I could have just purchased a new lead from my headphones and sold it on. Cannot beat good old wires. You know where you stand with them!
Problem with that is it is normally cheaper to buy new headphones than buy a new cable. Of course they don't make my headphones any more. Plenty of alternatives I guess but none of them with the volume on the side which I like.

So I guess I will just look for a curly cable and just change it and have done with it all.