1. USB2.0 interface. 2.High performance internal antenna 3.Support Data SMS functions 7.2Mbps HSDPA Download Speeds,384Kbps HSDPA Upload Speeds (Upgradeable),MSM6280 chip set Zero-CD installation GSM/GPRS/EDGE 850/900/1800/2100MHSDPA/WCDMA 2100MHzUSB interfaceMicro SD Memory card slot(up to 4G)Support Windows2000,Windows XP,Windows Vista,Windows7(32/64),Mac OS