SIMCOM GSM/GPRS module SIM300
Features:
 Tri Band GSM/GPRS 900/1800/1900 MHz
 Compliant to GSM phase 2/2+
 GPRS Class 10/8
 Output power: Class4 2W for EGSM900
                 Class2 1W for GSM1800/GSM1900
 Control via AT commands
 TCP/IP stack 
 SIM application tool kit
 Supply voltage range: 3.4-4.5VDC
 Temperature range: -20 to +55 (operational functionality)
                      -40 to +85 (storage temperature)       
 Dimensions: 40x 33x 2.85mm
 Weight: 8g
 Voice: FR/EFR/HR/AMR, noise suppression and echo cancellation
              PCM audio, Emergency calls
 SMS: Text and PDU mode, Point to point (MO/MT), Cell broadcast 
 DATA: non transparent, CSD up to 14.4kbps, USSD, 
 Interfaces: UART, RF connector, 60 pin system connector,
              Keypad and LCD, etc.

Accessories
 GSM/GPRS antennas
 60 pin system connector
 SIM card holder
 U.FL to SMA RF cable