You can never have too many audio cables. This cable is more useful than most: a flat, 3-foot (1.8 m)-long 2-channel stereo cable with 1/8" (3.5 mm) stereo connectors on either end, and slim boots that fit almost anywhere. You'll use it to connect to the AUX-in port of your car stereo, the mic jack in your home entertainment system, and all kinds of headphone jacks, everywhere.