led programming sign display 1.SD-P16-RGB-4x2 2.Control:RS232/USB/ ... .LEDs:Cree, Silan 4.1/4 scan Poosled Good Quality led programming sign display Able to show text, message,numbers,date,time ... in operation, more attactive compared with traditional banner. 2) The LED sign supports many kinds of languages and characters.3) A lot ...