900/1800 Dual Band, GSM Input Voltage 5 30 V DC GPRS Class B, Class 2 (28.8 Kbps down load, 14.4 Kbps up load) Fully Type approved R&TTE(Radio & telecommunication terminal equipment) AT Command set (GSM 07.05 and 07.07) Suitable for Data, SMS, Voice & Fax SIM Tool Kit Class 2 DTMF(DUAL TIME MULTI FREQUENCY) Function Data circuit asynchronous, transparent, non transparent up to 14.4 Kbps SMS Text & PDU, Point to Point (MT/MO), Cell Broadcast One user programmable I/O port for connecting external devices Current consumption: max. 450 mA (avg.), max. 2.5 A Peak, up to 35 mA in idle mode Complete with SIM Holder Temperature - Operation : -15 to +70 deg. C, Storage : -20 to 65 deg. C CE Approved