... board Multi size PC-usb,RS232, TCP/IP, RF wireless, GPRS communication Two years guaranty LED moving display sign Multi ... ). Communication model: PC-USB, RS232, RS485, TCP/IP, RF wireless, GPRS communication interface optional2. Features1). Support the segmentation of the ... memories.5).Support for LAN control.6).Built-in real time clock. Customized time/date format are also available.6).Multi-size ...