If you are using a modern OS (Windows 10 or 11), you generally . These versions include "Class Drivers" that recognize most legacy Bluetooth chips automatically. Plug the device into a USB 2.0 port. Go to Settings > Devices > Bluetooth & other devices .
If you want, I can search for current download links for the SSDBT819 driver and list direct sources for your OS (Windows/Linux). techcom ssdbt819 driver download link