LD9000 Pole Display (9.5mm, 2-Line x 20-Character, Single-Sided, RS232 Interface with Logic Command Set) - Color: Beige The LD9000 is a two line twenty character pole display that solves the classic I wish I had an extra I-O port problem. Bright blue-green vacuum fluorescent characters are enhanced with an optical filter for better contrast and easier viewing. All standard displays support moving sign advertisements with smart scrolling during periods of inactivity with a single message download eliminating constant application software refreshing. Double side models available. Each side displays the same or different messages.