Urbanears Plattan On-Ear Headphones, Cobalt (4091014) INTERCHANGEABLE CABLE WEAR THEM ON THE LEFT OR WEAR THEM ON THE RIGHT. The detachable cord gives you the option with an input on both sides, allowing you to choose whichever suits you best. ZOUNDPLUG INSTANT MUSIC SHARING The ZoundPlug is not really a plug, but a socket that lets you share your music with a friend. Simply plug another pair of headphones in via the empty outlet on the ear cap and enjoy. COLLAPSIBLE TAKE THEM EVERYWHERE We know you take your headphones with you wherever you go, so we made sure to design ours to be fully collapsible so you can easily fold them down and be on your merry way. MICROPHONE & REMOTE FOR HANDS-FREE TALKING Most music devices today are also cell phones. That's why all our headphones come with a built-in microphone and remote. Use it to pick up calls, or fast forward or rewind your music. AUDIO 40mm Handmade Drivers Frequency Response 20Hz-20kHz Impedance 60 Sensitivity 115dB Max Input Power 50mW