USB 3.0 ports can cause 2.4 GHz interference with Bluetooth devices. Plug the BT-BU1 into a USB 2.0 port (typically black) if you experience poor range.
Given the difficulty of finding a stable, signed driver for Windows 11, many users spend hours debugging Code 10 and Code 43 errors. Modern, name-brand Bluetooth 5.3 adapters from ASUS, TP-Link (UB500), or ZEXMTE cost less than $15 USD and come with automatic Windows Update drivers. bt-bu1 driver
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