Professional signage display
means an electronic display that is:
(1) Composed of an area greater than 1,400 square inches;
(2) Composed of two or more display panels, each with a diagonal size greater than 12 inches;
(3) Designed to be operated by an external data controller; and
(4) Designed and marketed for viewing by multiple people in a non-desk-based environment. Examples of such environments include stadiums, airports, and convention centers.