Specifications: .HSDPA/ WCDMA 2100MHz .GSM / GPRS / EDGE 850 / 900 / 1800 / 1900MHz .HSDPA data transfer speed up to 7.2Mbps, and 5.76 Upload .USB interface .Installs automatically and easy to use .Micro SD Memory card slot up (up to 16GB) .SMS .3.5G Next generation broadband technology Dimensions: Size: 70.1mm X 25.7mm X 11.6mm Weight: 30g System requirements: Windows 2000 / XP / Vista / 7 or Mac OS X 128MB of RAM 50MB free hard disck space or above USB slot