Seller enterway

main chip msm6280 frequency band hsdpa/umits:2100mhz,gsm850/900/1800/1900mhz technical standards sensitivity -104dbm data service rate max7.2mbps(download)/384kbps(upload) sms services support r-uim support at command supports the standard at command set temperature normal operating temperature:-20°c~+55°c storage temperature:-30°c~+65°c voltage 5.0v rohs environmental comply with rohs environmental protection certification requirements ce certification meet the 3c standard interface usb 2.0 interface, plug & play, receiver features dual antenna ,receive diversity micro sd card slot support driver installation free cd-rom installation support os windows xp/vista win7 32/64mac ,english system. other language versions can be modified according to user needs physical dimensions 81(l)x26(w)x11(l)mm color white, black(selected)