Play audio from ANY device with a standard 3.5mm headphone/AUX out jack through your Bose Sounddock Series I Version 1 speaker system. For example, you can connect the Sounddock to your laptop or tablet and use the media player to play any audio file. Or connect it to any phone or MP3 player with a standard headphone jack. This only works with the original Sounddocks made before 2009. Those models do not beep when you plug in the power cord. BLACK *ONLY* for Sounddock Series 1 Version 1. Not compatible with any other version. If your Sounddock beeps when you plug it in then it is NOT compatible. Each cable individually tested and backed by our full 1 year warranty These WORK as advertised. Made in USA!! FREE tech support included! Just message us with any questions. Additional Details ------------------------------ Package quantity: 1