Sony's first closed-type Fontopia(R) design reduces outside noise for high-intensity listening, helping to generate powerful, resonant bass response. So exercise, dance, or skate with the new Fontopia(R) Headphones. Featuring a Super-light in-the-ear Design for a snug, comfortable fit inside the ear, eliminating the headband, Super-small 9mm Driver Unit, and Soft, Silicon Ear buds, these headphones were created to enhance your on-the-go listening. Two sizes of ear buds are also included which are washable, removable and replaceable. So move to your music with the Fontopia(R) Headphones. Magnet - 400kJ/mA high-power Neodymium Plug - Gold-plated, L-Shaped, Stereo Mini Plug for exceptional corrosion resistance, superb conductivity, low noise Impedance - 16 ohms at 1,000 Hz Sensitivity - 100dB/mW Power Handling Capacity - 100mW Color - Grey Supplied Accessories - Compact case, Second set ear pads Streamlined, Compact Case neatly stores the ear-buds and headphone cord when not in use; vivid purple styling; high-impact case is ideal for carrying in a pocket or backpack New Case Design minimizes cord tangle; partial winding can shorten the effective cord length during use