Detailed Product Description HUAWEI EC121 3G wireless modemsDetailed Description HuaWei EC121, USB CDMA 800MHz modem,CDMA 800mhz data Card,CDMA Wireless Data Card,Cdma Wireless modem,Usb CDMA Data Card - CDMA 800Mhz 2000 1x; - Maximum Download Speed: 153.2 kbps; - Operate System: Windows 2000/XP/Vista/Mac Function: Data, SMS,Voice