Including : 

6ft Toslink Male to Mini-Toslink Male Fiber Optic Audio Cable

 Bose sound systems that offer or have offered Mini-Toslink (optical digital) for audio output include:

Why it's useful
Optical signals, like those used by TOSLINK, are less susceptible to problems that can affect electrical signals, such as magnetic interference, radio frequency interference, and crosstalk.
You can enjoy high quality audio on your Home Audio System