SIM900A Module 

The SIM900A is a complete Dual-band GSM/GPRS module in a SMT type which is designed specially for Chinese market, allowing you to benefit from small dimensions and cost-effective solutions. Featuring an industry-standard interface, the SIM900A delivers GSM/GPRS 900/1800MHz performance for voice, SMS, Data, and Fax in a small form factor and with low power consumption. With a tiny configuration of 24mm x 24mm x 3 mm, SIM900A can fit almost all the space requirements in your applications, especially for slim and compact demand of design.

General features 

* Dual-Band 900/ 1800 MHz 
* GPRS multi-slot class 10/8 
* GPRS mobile station class B 
* Compliant to GSM phase 2/2+ 
  – Class 4 (2 W @900 MHz) 
  – Class 1 (1 W @ 1800MHz) 
* Dimensions: 24*24*3 mm 
* Weight: 3.4g 
* Control via AT commands (GSM 07.07 ,07.05 and   
  SIMCOM enhanced AT Commands) 
* SIM application toolkit 
* Supply voltage range : 3.1 ... 4.8V 
* Low power consumption: 1.5mA(sleep mode) 
* Operation temperature: -40°C to +85 °C