Sony MDR-E828LP Fontopia Earbuds with Winding Case (Discontinued by Manufacturer) Fontopia In-The-Ear Design 16Mm Dia Driver Neodymium Magnet Power Handling: 50 Mw Freq Resp: 16 Hz22 Khz Imp: 16 Ohm Sony Acoustic Twin Turbo Circuitry Super-light in-the-ear design High-quality 16mm driver units Sleek black and silver metallic housing Neodymium magnets provide powerful bass and clear treble Compact winding case supplied