... 900/1800MHZ Internet, SMS, data, STK USB INDUSTRIAL GSM/GPRS MODEM Product description:Industrial designAluminum casingWireless access to internetBased on Siemens ... function (DTMF)Send and receive data, e-mail, SMSMaximum transmitting speed 115.2KB/sGPRS Class 10Antenna with high sensitivityAlways on-lineOutput ...