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Fontopia in-the-ear design fits snugly, yet comfortably inside the ear; eliminates the headband so you can enjoy music while exercising, skating or dancing 16 mm Diameter Driver delivers deeper bass, extended treble and higher fidelity, yet remains small enough to fit inside your ear Bio-cellulose diaphragm for remarkable, full-range sound, frequency response from 8 to 27,000 Hz Sony Acoustic Turbo Circuit for high efficiency; gets high sonic output from your portable stereo; extends bass response Thinner housing and slim, super-flexible ducts for a snugger, more comfortable fit Silent Cap prevents sound leakage, makes your music less likely to disturb your neighbors Neodymium magnets for maximum energy and minimum size; Neodymium packs more magnetic energy per ounce than conventional Ferrite, Samarium Cobalt or Aluminum magnets; help produce ample sound output-106 dB sensitivity Linear-Crystal Oxygen-Free Copper (LC-OFC) Class 1 Cord uses high-tech copper crystals of exceptional purity for outstanding signal |