Sony Ericsson Mobile Broadband USB Unlocked Modem Networks: HSDPA 850/1900/2100 MHz, UMTS 850/1900/2100 MHz, EDGE 850/900/1800/1900 MHz, GPRS 850/900/1800/1900 MHz Supported operating systems: Apple Mac OS X (supported by third-party SW provider free download) Windows XP (32/64 bit) Windows 2000 (SP4) Windows Vista (32/64 bit) SIM Card: supports 1.8 and 3-Volt SIM cards Send and receive SMS directly from your PC Integrated antenna