Full Details from Amazon.com : http://www.amazon.com/gp/product/B00INJZSL6?tag=onigi-20<br /><br />SainSmart SIM900 GSM/GPRS Function Module Adapter for Raspberry PI Arduino<br /><br />Quad-Band 850 900 1800 1900 MHz <br />GPRS multi-slot class 108GPRS mobile station class B <br />Compliant to GSM phase 22Class 4 2 W 850 900 MHz <br />Class 1 1 W 18001900MHz <br />Control via AT commands GSM 0707 0705 and SIMCOM enhanced AT Commands
