Sony offers the MDR-W14L Vertical, In-The-Ear Headphones. Vertical In-The-Ear Design reduces size and weight to the bare minimum, comfortable hour after hour. Wide Headband allows for broader weight distribution, greater comfort. 13.5 MM Diameter Driver is small enough to fit inside your ear. Neodymium Magnet provides maximum energy in minimum size. Neodymium is comparably more powerful than conventional Samarium Cobalt or Aluminum magnets. Sony Acoustic Twin Turbo Circuit assures high efficiency, gets high sonic output from your portable stereo and extends bass down to 18 Hz. Nickel-Plated Mini-Plug resists corrosion for high conductivity, low noise.