... MC39I 900/1800MHZ Internet, SMS, data, STK USB INDUSTRIAL GSM/GPRS MODEM Product description:Industrial designAluminum casingWireless access to internetBased ... with ETSI GSM phase 2+3V SIM card slotStandard USB interfaceSIM Application ToolkitDouble tone multi-frequency function (DTMF) ... -20 -+55Storage temperature:-25 -+70Size85*54*25mmWeight110gAccessories: USB cable, antenna, 2 mounting plates, CD