09 Skullcandy FMJ's stand for Full Metal Jacket. That's a metal casei with some precision engineering that contains some high grade components that deliver great sound. Despite its outstanding frequency separation, crystal clear mids and highs, and enough bass to rock a mule's ass to the moon, the FMJ is not officially the favorite ear bud of everyone on Earth. Technically, the Skullcandy FMJ is only the official favorite bud of people with ears and personal style. Also available, the FMJ for your iPhone and Blackberry Curve . Skullcandy's iPhone FMJ lets you and your iPhone rock together AND talk together. We don't care who you talk with. SPECIFICATIONS 11mm speaker Frequency range: 16 Hz – 20K Hz Impedance: 16 ohms Max input power: 5mW Cable type: Aluminum foil Cable length: 1.1 M Plug type: 3.5mm gold plated Note: This 50% discount offer is not available for Hong Kong customers. To Take advantage of the free shipping offer, enter discount code freefmjship during checkout Please select from the available color options below: