18 U.S.C. § 2512 : US Code - Section 2512: Manufacture, distribution, possession, and advertising of wire, oral, or electronic communication intercepting devices prohibited

      (1) Except as otherwise specifically provided in this chapter,
    any person who intentionally - 
        (a) sends through the mail, or sends or carries in interstate
      or foreign commerce, any electronic, mechanical, or other device,
      knowing or having reason to know that the design of such device
      renders it primarily useful for the purpose of the surreptitious
      interception of wire, oral, or electronic communications;
        (b) manufactures, assembles, possesses, or sells any
      electronic, mechanical, or other device, knowing or having reason
      to know that the design of such device renders it primarily
      useful for the purpose of the surreptitious interception of wire,
      oral, or electronic communications, and that such device or any
      component thereof has been or will be sent through the mail or
      transported in interstate or foreign commerce; or
        (c) places in any newspaper, magazine, handbill, or other
      publication or disseminates by electronic means any advertisement
      of - 
          (i) any electronic, mechanical, or other device knowing or
        having reason to know that the design of such device renders it
        primarily useful for the purpose of the surreptitious
        interception of wire, oral, or electronic communications; or
          (ii) any other electronic, mechanical, or other device, where
        such advertisement promotes the use of such device for the
        purpose of the surreptitious interception of wire, oral, or
        electronic communications,

      knowing the content of the advertisement and knowing or having
      reason to know that such advertisement will be sent through the
      mail or transported in interstate or foreign commerce,

    shall be fined under this title or imprisoned not more than five
    years, or both.
      (2) It shall not be unlawful under this section for - 
        (a) a provider of wire or electronic communication service or
      an officer, agent, or employee of, or a person under contract
      with, such a provider, in the normal course of the business of
      providing that wire or electronic communication service, or
        (b) an officer, agent, or employee of, or a person under
      contract with, the United States, a State, or a political
      subdivision thereof, in the normal course of the activities of
      the United States, a State, or a political subdivision thereof,

    to send through the mail, send or carry in interstate or foreign
    commerce, or manufacture, assemble, possess, or sell any
    electronic, mechanical, or other device knowing or having reason to
    know that the design of such device renders it primarily useful for
    the purpose of the surreptitious interception of wire, oral, or
    electronic communications.
      (3) It shall not be unlawful under this section to advertise for
    sale a device described in subsection (1) of this section if the
    advertisement is mailed, sent, or carried in interstate or foreign
    commerce solely to a domestic provider of wire or electronic
    communication service or to an agency of the United States, a
    State, or a political subdivision thereof which is duly authorized
    to use such device.