Skullcandy Buds Ink'd Earbuds - Blue Earbud Headphones; In-Ear Frequency Response: 10-23kHz Impedance: 16 ohms Driver Size: 11 mm Plug Size: 3.5 mm Compatible with MP3 Players, iPhone, Computer, CD Players, iPod, DVD Players Features: Rich, Detailed Music, Neodymium Magnet Audio Features: Outstanding Bass Response Unit Construction: Custom-Fit Design Cord and Cable Features: Single-Entry Cord Accessories Included: 3 Different Sizes of Silicone Inserts Lifetime Warranty