... voice transmission, SMS and data transmission, supporting RS232 serial port MD-FLY260 is a GSM 900/1800 or 850/1900 dual ... .28) Serial interface supporting:? Baud rate (bits/s): 300, 600, 1200, 2400, 4800, 9600,19200, 38400, 57600, 115200,? Autobauding (bits/s ... of charge.USSDOtherDC power supplyReal Time Clock with calendarComplete shielding MD-FLY260 GSM Modem