High impedance crystal earphone is very sensitive and works great with crystal radios. Has 3 ft. cord and miniature (3.5 mm) plug.

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High impedance crystal earphone is very sensitive and works great with crystal radios. Has 3 ft. cord and miniature (3.5 mm) plug.

  • High impedance crystal earphone - very sensitive and works great with crystal radios
  • Has 3 a foot cord and miniature (3.5 mm) plug.

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