Bose Companion 2 Series III Multimedia Speakers – for PC 3.5mm AUX & PC input. High quality audio performance, with clear sound at any volume. Use the auxiliary input to bring Bose performance to another audio source such as your iPhone or iPad. Upgrade your sound and your experience with Bose Companion 2 Series III speakers. Play an additional device just connect to the auxiliary input. Volume controlheadphone jack on front of the right speaker. Operating compatibility: Mac, Windows XP.