Browse Internet with high speed. Frequency band: 800Mhz Wireless Network: CDMA 2000 1X Interface: USB 2.0 compliant and 1.1 compatible Speed Rate: 153.6Kbps (maximum) Features Browse Internet with high speed. File Transmission. Voice calling. Receive/Send E-mail. Receive and Send Short Message (SMS). Specifications Frequency band: 800Mhz Wireless Network: CDMA 2000 1X Operating System: Windows 2000, XP Interface: USB 2.0 compliant and 1.1 compatible Power Supply: USB powered (4.5V ~ 5.5V) Speed Rate: 153.6Kbps (maximum) Dimension: 78mm?6mm?3mm