Advanced Features WCDMA2100 or 1900 MHz, HSDPA 7.2Mbps; GSM850/900/1800/1900 MHz; GPRS / EDGE; Standard USB2.0 interface; Plug & Play features;; U-Disk functions, Support Windows XP/2K/Vista, receive/send SMS in PC side Technical Profile: Network Frequency: WCDMA2100 or 1900MHz GSM 850/900/1800/1900MHz Antenna Type: Internal Dimensions: 87x38.5x12.5(mm) OS support: Windows XP/2K/Vista ;Memory: 512MbNANDú½256MbSDRAM ;3 Blue LED indicator for network status ;1 Green LED indicator for power supply ;Weight: 36g ;OS support: Win 2000, WinXP,Win2003ú¼Vista, MAC ;Normal operation temperature: -10íµ to +55íµ ata Services: High Speed Data Transfer: HSDPA( up to 7.2Mbps) GPRS / EDGE Interfaces: USB2.0 SIM card Software Features: WCDMA Equalizer Plug and Play Support U-disk (32MB) LED Indicator for signal Receive/Send SMS Phone book and SIM Card management(through PC tools) Weight: 36g Dimensions: 87x38.5x12.5(mm)