Any person advertising or offering for sale automatic dialing-announcing devices, as defined in Section 2871 of the Public Utilities Code, shall specify on all advertising therefor and in the instruction manual or other information included with the equipment that the equipment may be operated within California only in accordance with Article 1 (commencing with Section 2871) of Chapter 10 of Part 2 of Division 1 of the Public Utilities Code. The person shall also provide a full copy of that article to each purchaser of the equipment, and shall also provide a full copy to each prospective purchaser upon request.