1.Wireless USB modem 2.WCDMA/HSPA 850/1900/2100MHz 3.Support SMS,Call,CSD,Dial-up for broadband 4.USB2.0 high ... module,wcdma-hsdpa/hsupa network2.Reliable hspa 3g solution for SMS,CSD,telephone and dial-up3.Built-in USB expansion slot4 ... MO and MT CB and PDU mode,support digital,voice,sms,fax transmissionCSD maximum up to 14.4 kbps Frequency 850 ...