USB2.0 interface 16 PCI Port modem USB Interface,GPS/GPRS Modem Pool,SupportSMS,MMS,WAP,FAX,AT command Warranty 1 ... modem USB Interface,GPS/GPRS Modem Pool,Support SMS,MMS,WAP,GPRS,FAX,Voic,AT command,TCP/IP stackMulti-socket GSM GPRS 16 ports modem ... multiple macines at the same time.A, system advantages:Wireless GSM/GPRS /MODEM built on the broad masses of the personal needs ...