Urbanears Medis In-Ear Headphone, Indigo (4091005) EARCLICK The Ear Click solution ingeniously secures the earpiece in two places rather than one, relieving pressure while keeping it firmly in place. With four interchangeable ear pads in different sizes, it's always easy to find your perfect fit. 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 15.4mm Handmade Drivers Frequency Response 20Hz-20kHz Impedance 32 Sensitivity 115dB Max Input Power 5mW