CDMA E520 is a CDMA 1X PC card, enables the customers to connect to Internet anytime anywhere without limitation. Its transmission rates can reach as high as 153.6kb/s with PC Express slot for general connect with any PC laptop. Feature Browse Internet with high speed. File Transmission. Receive/Send E-mail. Receive and Send Short Message (SMS). Technological Specification Support Network: CDMA2000 1X Interface: PCI Express Frequency: Send: 824.640 - 848.370MHz Receive: 869.640 - 893.370MHz Speed Rate: 153.6Kbps/230.4Kbps Power management: intelligent Power management Voltage: DC3.3 V Channels: 21 Channel Channel Range: 1.23MHz Sensitivity: -106DBm