RS485 GSM/GPRS Modem SIMCOM SIM900 Module GSM/GPRS Modem GSM/GPRS/GPS Modem Q24 Plus Module/Modem RS485 GSM/GPRS Modem Based on SIMCOM Q24 Plus Module Product description:Industrial designAluminum casingWireless access to internetBased on Wavecom module Q24 PlusWith TCP/IP stackInternet Services: PPP,TCP, UDPNo FTPOpen ATFlash memory 32MB, PSRAM 16MB850/900/1800/1900MHZ3V SIM card slotSIM ...