Detailed Product Description ZTE AC581 3G wireless modemsCDMA 20001X EV-DO 800Mhz FeaturesA high transmission rate ... connecting rope, preventing loss of cards hat.6, pairs of antenna design, support diversity processing technology, the signal is more ... UL 1.8MbpsBulk SMS functionality to support business andSupport Internal Antenna (internal antenna)Supports Windows 2000, XP, Vista, Mac OS operating ...