... board Multi size PC-usb,RS232, TCP/IP, RF wireless, GPRS communication Two years guaranty LED moving display sign Multi size ... PC-usb,RS232, TCP/IP, RF wireless, GPRS communication Two years guaranty Cheapest price LED sign, LED moving ... Communication model: PC-USB, RS232, RS485, TCP/IP, RF wireless, GPRS communication interface optional2. Features1). Support the segmentation of the playing ...