If your computer does not automatically recognize the device, do not panic. Here is the step-by-step process to get it working.
You plug in the adapter. You hear the USB chime. You open Bluetooth settings... and nothing. Or you see "Unknown USB Device (Device Descriptor Request Failed)." Here is why: orico bta-403 driver
Here are the technical specifications of the Orico BTA-403: If your computer does not automatically recognize the