SIM900A GSM GPRS Module with RS232 Interface and SMA Antenna

Module: SIM900A GSM/GPRS Module Frequency Bands: GSM 850/900/1800/1900 MHz (Quad-band) SIM Support:                Standard 2G SIM Card Operating Voltage: 5V (recommended 12V external supply) Interface: UART (TX/RX) @ 9600 baud (default) Functions: SMS, Voice Call, GPRS Data Antenna Connector: SMA or PCB Antenna (varies by model) Power Consumption: Idle: ~10mA, Transmit: ~200mA (Approx) Dimensions:                ~45mm x 50mm x 15mm (Approx)