The GSM/ GPRS SIM900 Module is a breakout board with dual frequency. This module has on board two set power supply interface, SAM female socket and IPX mini antenna interfaces. This module has selectable interfacing voltage which allows to connect 5V and 3V microcontroller directly. It has in built GPRS multi slot class 10/8 and mobile station class B. It has serial port circuit with protection and supports power on and reset. This module is mostly used to send and read SMS, data transfer application in M2M interface.
