... Description hsdpa usb modemNM620 is a HSDPA data card, dimension: 86×27×12.5mm 2.Hardware specifications: InterfaceUSB2.0 Network supportGSM/GPRS/EDGE/HSDPA FrequencyHSDPA ... 384Kbps Storage CapacityUp to 4G Micro-SD (T-Flash) card Auto-installationSupport Phone callsN/A SMSSupport Working Temperature-10C ~ ... Support Windows 2k, XP, Vista 3.2. Data Transfer HSDPA 3.6Mbps, UMTS DL/UL 384Kbps 3.4. SMS 3 ...