• R-Columbia Products co.

    Highland Park, IL 60035

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    2008 St. Johns Ave.
    Highland Park, IL 60035
    United States of America
    http://www.rcolumbia.com
    847 432-7915

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    830 350
    Jan. 13, 2006
    Hands-free,wireless head phone communication system now enables two to five users to talk and listen simultaneously. There are no push-to-talk buttons, base stations, or belt ...