YMOO Bluetooth 5.3 Transmitter Receiver, 2-in-1 3.5mm Jack Bluetooth Audio Adapter, Pair 2 Bluetooth Devices Simultaneously for Home Stereo/TV/Headphones/PC/Speaker - Yahoo Shopping
Teardown: Bluetooth audio dongle keeps it simple - EDN
IOGEAR - GBU521 - | Bluetooth Adapter | Bluetooth Dongle | USB Bluetooth
Plugable USB 2.0 Bluetooth® Adapter – Plugable Technologies
Logitech Bluetooth Audio Receiver for Wireless Streaming
Logitech Bluetooth Audio Receiver for Wireless Streaming
Logitech Unifying Receiver for Connecting Multiple Devices
User manual Logitech Bluetooth Audio Adapter (English - 143 pages)
Teardown: Bluetooth audio dongle keeps it simple - EDN