BT-5.4 USB Dongle, which is a Bluetooth adapter designed for wireless connectivity. -Black

USB Bluetooth adapter, also known as a Bluetooth dongle.

This particular model appears to be a Bluetooth 5.4 adapter, offering faster transmission rates and improved stability and compatibility compared to older versions.

It supports dual-mode EDR/LE stereo audio transmission, allowing for high-quality audio streaming.

It's designed to add Bluetooth functionality to devices like PCs or laptops that may not have built-in Bluetooth, or to upgrade older Bluetooth versions.

The compact design allows it to stay plugged in without obstructing adjacent USB ports.

It's compatible with various operating systems, including Windows, and often supports plug-and-play functionality.