What is SIM900 GSM/GPRS modem ?

  1. GSM/GPRS Modem-RS232 is built with Quad Band GSM/GPRS engine- SIM900, works on frequencies 850/ 900/ 1800/ 1900 MHz.
  2. The Modem is coming with RS232 interface,which allows you connect PC as well as microcontroller with RS232 Chip(MAX232).
  3. The baud rate is configurable from 9600-115200 (default baudrate is 9600) through AT command.
  4. The GSM/GPRS Modem is having internal TCP/IP stack to enable you to connect with internet via GPRS.
  5. It is suitable for SMS, Voice as well as DATA transfer application in M2M interface.


  1. High Quality Product (Not hobby grade)Quad-Band GSM/GPRS 850/ 900/ 1800/ 1900 MHz.
  2. RS232 interface for direct communication with computer or MCU kit.
  3. Configurable baud rateSMA connector with GSM Antenna.SIM Card holder.
  4. Built in Network Status LEDInbuilt Powerful TCP/IP protocol stack for internet data transfer over GPRS.
  5. Audio interface ConnectorNormal operation temperature: -20 °C to +55 °C.
  6. Input Voltage: 4.5V-12V DC.


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