Amazon.com: Logitech Wireless Speaker Adapter for Bluetooth Audio Devices : Electronics
Logitech Unifying receiver - Wikipedia
Logitech Unifying receiver - Wikipedia
Logitech Bluetooth Audio Receiver - USB Powered
Logitech Bluetooth-Adapter »Logi USB unifying receiver« | BAUR
Logitech Bluetooth Audio Receiver for Wireless Streaming
Amazon.com: Logitech Unifying Receiver, 2.4 GHz Wireless Technology, USB Plug Compatible with all Logitech Unifying Devices like Wireless Mouse and Keyboard, PC / Mac / Laptop - Black : Electronics