Urbanears Humlan On-Ear Headphones, Moss (4090858) Wash And Wear For Non-Stop Musical Freshness: The world's first headphone with washable parts, Humlan features a removable headband and ear cushions that can be thrown in with your laundry Zound Plug Instant Music Sharing: The Zound Plug 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 Microphone and 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 Dynamic Drivers. Frequency Response 20Hz-20kHz. Impedance 32Ohm. Sensitivity 100dB. Max Input Power 100mVat1kHz