Sierra Wireless 888 Unlocked 3G GSM USB Mobile Broadband Aircard Modem Unlocked for any GSM carrier in the operating frequencies supported. HSUPA/HSDPA/UMTS/WCDMA 850/1900/2100 MHz EDGE/GPRS/GSM 850/900/1800/1900 MHz Compatible for Windows 7 Mobile Broadband Windows 7 Windows Vista Windows XP Mac OS X Micro SD slot (Sim card or Micro SD card are not included) External Antenna Port