4 USB 3.0 Ports for High-speed Transmission- atolla USB hub can expand 4 USB 3.0 ports for your computer, and transfer rates up to 5Gbps to allow data to move quickly between devices; it's backward compatible with your older USB 2.0 devices; plug and play without driver installation Smart Port for Synchronous Charging- The smart-charging port provides up to 2.4Amps powering your smartphone, tablet, and other USB-charged devices, including Android, Apple, and Samsung devices