Main parameters 1.Frequency: GSM 900&1800 MHz/ GSM 2.850&900&1800&1900MHz 3Dimension: 38.0mm x 28.0mm x 2.3mm 4Weight: 8 Voice, SMS and data functionsStamp holes connectionThinner body, lower currentZTEMT GSM Modules MG3030/3036 ZTEMT GSM Modules MG3030/3036