Sony offers the MDR-W24V vertical, in-the-ear headphones. Vertical in-the-ear design reduces size and weight to the bare minimum to be comfortable hour after hour. Cord-Mounted Volume Control is always handy. No more groping for the volume on your portable stereo. Wide Headband allows for broader weight distribution, greater comfort. 13.5 MM Diameter Driver is small enough to fit inside your ear. Neodymium Magnet assures maximum energy in minimum size. Neodymium is comparably more powerful than conventional Samarium Cobalt or Aluminum magnets. Sony Acoustic Twin Turbo Circuit allows for 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.