... individual module be demolished♦Industrial chassis, elegant shell♦GSM frequency: 850/900/1800/1900 MHz♦32 x SIM card(big/small ... ♦upport dual band:900/1800 MHz or quad-band GSM: 850/900/ 1800/1900 MHz♦ Meet the ETSI GSM 2 + standards ... with external antenna Supported operating systems-Windows 7 (Home, Premium, Pro, Ultimate, Enterprise)-Windows Vista (Home, Business, Ultimate, Enterprise)-Windows XP ...