The CD that came with the device listed RTL8671B, but it's not on Realtek's website. Instead the manual points you to:
https://www.mytechkey.com/pages/driver
4.Bluetooth 5.0 Dongle
Driver Link:
https://www.dropbox.com/s/gwo9lz777i82f70/BT5.0%20Driver.zip?dl=0
Hope that helps someone.
https://github.com/peteristhegreat/drivers-backup/releases/tag/1.0
Direct link
https://github.com/peteristhegreat/drivers-backup/releases/download/1.0/BT5.0.Driver.zip
Adding visibility to @carkrueger 's comment below
If you look here: https://www.catalog.update.microsoft.com/Search.aspx?q=realtek+bluetooth+1.6.1015 You will find now: 1.6.1015.3014 from 11.01.2021
Direct download link: http://download.windowsupdate.com/c/msdownload/update/driver/drvs/2021/02/0d13721d-7aa7-47cf-887a-f53bcd228a5e_04c173bad44cec04d528d260392958dc6e5bcec3.cab
for backup purposes: h**ps://web.archive.org/web/20210216175344/http://download.windowsupdate.com/c/msdownload/update/driver/drvs/2021/02/0d13721d-7aa7-47cf-887a-f53bcd228a5e_04c173bad44cec04d528d260392958dc6e5bcec3.cab
Direct download and the popup window for 1.6.1015.3014
didn't initially work. I ended up needing to right click the link and select Save target as
.
For it to work for me on Windows 10, I unzipped the cab file into a folder and then used Device Manager to look at that folder. Worked like a charm.
1.9.1038.3004 Does it work with this adapter? are you sure? previously 1.9 never worked with rtl8761b
The realtek specifications on the site indicate that rtl8761b supports a driver not higher than version 1.6
As for SBC, It's disgusting, as for AAC, it's heaven and earth in comparison, and aac's latency is acceptable, which allows you to use headphones as a gaming headset, it's a completely different sound quality, an order of magnitude higher, it's more stable and the sound is more detailed and less distorted. This description is suitable for both android smartphones and for a desktop computer with windows. If you don't feel it, your headphones are probably to blame.
https://catalog.s.download.windowsupdate.com/c/msdownload/update/driver/drvs/2022/04/05dd7d26-140f-4c55-af30-52d7191f8068_b2d9bfd0a9e9a1eb1264d2e6e8e449e9bd144f5a.cab
Very strange, this driver does not work at all, although support for our chip is declared, but the driver that you sent above really works, although earlier version 1.9 did not work in principle, and realtek said that this chip does not support the version above. but the version of hci and lmp is lower than on driver 1.6
It turns out that you are using a newer driver, but your bluetooth version is lower. Instead of 5.1-5.2 are you using bluetooth 5? or 4 maybe even.
With the driver that you sent, version HCI 9.55465 LMP 9.17330, but the same with the one I sent above. But in earlier versions of the driver from 1.6 there are versions of drivers modified by the Chinese in which the LMP version is 10+.
That is, a newer version of bluetooth with an older driver.
Standard windows driver, outputs HCI 10.11 AND LMP 10.34657
LMP 10 Corresponds to bluetooth 5.1, LMP 9, Corresponds to bluetooth 5.0, LMP 11 corresponds to bluetooth version 5.2