![Beneath the IO label of the Bose Companion 20, there is an additional circular port above the 'Audio In' port. What would this be? : r/bose Beneath the IO label of the Bose Companion 20, there is an additional circular port above the 'Audio In' port. What would this be? : r/bose](https://i.redd.it/hua8qt40s1k61.jpg)
Beneath the IO label of the Bose Companion 20, there is an additional circular port above the 'Audio In' port. What would this be? : r/bose
![UpBright 18V AC/DC Adapter Compatible with Bose Companion 20 Multimedia Speaker System 406358 329509-1300 Model PSM36W-180 330733-0020 DC18V 2A 18.0V 2.0A 18VDC 2000mA Switching Power Supply Charger : Amazon.ca: Electronics UpBright 18V AC/DC Adapter Compatible with Bose Companion 20 Multimedia Speaker System 406358 329509-1300 Model PSM36W-180 330733-0020 DC18V 2A 18.0V 2.0A 18VDC 2000mA Switching Power Supply Charger : Amazon.ca: Electronics](https://m.media-amazon.com/images/I/71gs4d7ZgeL.jpg)
UpBright 18V AC/DC Adapter Compatible with Bose Companion 20 Multimedia Speaker System 406358 329509-1300 Model PSM36W-180 330733-0020 DC18V 2A 18.0V 2.0A 18VDC 2000mA Switching Power Supply Charger : Amazon.ca: Electronics
![Bose Companion 2 Series III Multimedia Speakers - for PC (with 3.5mm AUX & PC Input) : Amazon.ca: Electronics Bose Companion 2 Series III Multimedia Speakers - for PC (with 3.5mm AUX & PC Input) : Amazon.ca: Electronics](https://m.media-amazon.com/images/I/71MHjYa1-pL._AC_UF894,1000_QL80_.jpg)
Bose Companion 2 Series III Multimedia Speakers - for PC (with 3.5mm AUX & PC Input) : Amazon.ca: Electronics
![HQRP AC Adapter works with Bose Companion 20 Multimedia Speaker System 329509-1300 PSM36W-180 Power Supply Cord Adaptor + Euro Plug Adapter : Amazon.ca: Electronics HQRP AC Adapter works with Bose Companion 20 Multimedia Speaker System 329509-1300 PSM36W-180 Power Supply Cord Adaptor + Euro Plug Adapter : Amazon.ca: Electronics](https://m.media-amazon.com/images/I/81yNjsdIQCL.jpg)