GSM SIM900A SHIELD

The GSM shield by Arduino is used to send receive messages and makereceive calls just like a mobile phone by using a SIM card by a network provider. We can do this by plugging the GSM shield into the Arduino board and then plugging in a SIM card from an operator that offers GPRS coverage. The shield employs the use of a radio modem by SIMComm. We can communicate easily with the shield using the AT commands. The GSM library contains many methods of communication with the shield. This GSM Modem can work with any GSM network operator SIM card just like a mobile phone with its own unique phone number. Advantage of using this modem will be that its RS232 port can be used to communicate and develop embedded applications. Applications like SMS Control, data transfer, remote control and logging can be developed easily using this.
Features:
Dual-Band 900 1800 MHz
GPRS multi-slot class 108
GPRS mobile station class B
Compliant to GSM phase 22+
Class 4 (2 W @900 MHz)
Class 1 (1 W @ 1800MHz)
Dimensions: 24*24*3 mm
Supply voltage range: 3.1- 4.8V