... DEMO and source code;Buttons, switches, timing, GSM / GPRS wireless communications and other typical applications;16,32 fonts communication protocol ... Mass-sending System;led display control card LS-D3(ALL) parameters Item No.LS-D3(LAN,USB,RS232)RangeSingle color 2048*64, ... , test button, switchPlayerLED Player 3.2Software for LS-D3(LAN,USB,RS232) led display controller Edit static text, single-line ...