Teardown: Bluetooth audio dongle keeps it simple - EDN
Logitech Bluetooth Audio Receiver for Wireless Streaming
Logitech Wireless Bluetooth Audio Receiver, Bluetooth Adapter for PC/Mac/Smartphone/Tablet/AV Receiver, 3.5mm Audio and RCA Outputs to Speakers, One-Push Pairing Button, UK Plug - Black/Blue : Amazon.co.uk: Electronics & Photo
Bluetooth audio receiver LOGITECH 980-000913 | Stephanis
Logitech Bluetooth Audio Receiver for Wireless Streaming
Amazon.com: Logitech Bluetooth Audio Adapter for Bluetooth Streaming : Electronics
Logitech Bluetooth Audio Wireless Speaker Adapter Receiver-New version