The PD3000 is a two line twenty character pole display that solve the classic "I wish I had an extra I/O port" problem, by using our data pass-through data capabilities. Logic Controls' data pass-through process allows connection of multiple pole displays, cash drawers, printers and other devices to a single output port. In the pass through mode, a pole display monitors the incoming data, then decides to display the data or pass it to the next down-stream device. 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 during periods of inactivity with a single message download, eliminating constant application software refreshing.