network device 1.Maio chip:QualcommUSA) MSM 6280 2.Support Band:HSDPA/UMTS/EDGE/GPRS/GSM 3.Network speed:HSDPA:downlink 7.2Mbps, uplink:384Kbps 4.Can expand 4GB SD card memory 5.Support USB (1.0 &highspeed 2.0) 6.Drive: no need drive 7.support system,windows 2000,windows xp,windows vista 8.Band: frequency 850/900/1800/1900/2100Mhz