Urbanears Bagis In-Ear Headphone, Indigo (4091019) SNAPCONSTRUCTION Inspired by the building blocks we played with as children, the SnapConstruction feature lets you connect your ear buds around your neck. That way, you can easily find them and continue enjoying your music whenever you're ready. 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 9mm Handmade Drivers Frequency Response 20Hz-20kHz Impedance 16 Sensitivity 107dB Max Input Power 5mW Connectivity Technology: Wired