SIMCom' SIM 900 is a ultra compact and solid remote module-SIM900. This is a total Broad-band GSM/GPRS module in a SMT write and designed with an intense single-chip processor coordinating AMR926EJ-S center, enabling you to profit by little measurements and practical arrangements.
SIM 900A is Compatible with ARDUINO, RASPBERRY PI, ARM, AVR, PIC, 8051, etc. - Can also be directly connected to computer via Serial Port (Use GSM Tester or write your own Software) Best suited for GSM based Microcontroller Projects (better than SIM300 and other GSM Modems) Option for connecting MIC and SPEAKER directly to GSM MODEM for calls (LINE IN also available)
Including an industry-standard interface, the SIM900 uses 900/1800MHz frequency for voice, SMS, Data, and Fax in a little shape factor and with low power utilization. With a small size, SIM900 can fit all the space necessities in your M2M applications, particularly for thin and compact requests of design.