Detailed Product Description CDMA USB modem, CDMA wireless modem, CDMA modem - MC318+ SpecificationCDMA 2000 1x 800MhzMaximum Downlink Speed: 230.4 kbps;Maximum Uplink Speed: 230.4 kbps;Operating System: Windows 2000/XP/Vista/Mac Apple;Function: Data, SMS(send and receive),Dial-up networking