EDGE 2.75G wireless 850/900/1800/1900MHz Support E-GPRS Class10,GPRS class12 Industrial,minimum size:100x60x25mm ... .4 kbps, USSD, Non transparent mode FrequencyQuad-Band GSM 850/900/1800/1900MHzCompatible with GPRS GSM network InterfaceUSB2.0 connection or DB9 rs232 serialOperating status ...