... data and SMS services; ---MicroSD memory expansion:Support 4GB TF card ---Plug & Play; ---Support Windows 2000, Windows XP, win7,Mac ... Antenna Built-in 6 bands Powered via USB interface SIM card slot Environmental: Operating Temperature: -20 to +60º C Storage Temperature: ... 2000, Windows XP, Windows Vista Operating Systems System Requirements: Card Slots: USB Interface CPU: Pentium 4 1GHz or above ...