Description of Skullcandy iPhone FMJ Headphones Think FMJ audio superiority with a new tightly-wrapped, coiled metal cable, plus the addition of a sleek in-line mic. That's right, Skullcandy's iPhone FMJ lets you and your iPhone rock together AND talk together. We don't care who you walk with. Also works with Blackberry Curve. Features: 11mm speaker Frequency range: 16 Hz 20K Hz Impedance: 16 ohms Max input power: 500mW Cable type: Aluminum foil Cable length: 1.1 M Plug type: 3.5mm gold plated EVA carrying case COMPLY foam tips