One 12W USB Charging-only Port: FEMORO powered usb hub offers an extra charging port, the charging port provides up to 12 watt of current. It need to collocation the 5V/3A power adapter. (Note: This charging port does not support data transfer!) 7 Ports USB 3.0 High Speed Transfer: Data speed up to 5Gbps, fast enough to transfer HD movies or large files in seconds, backwards compatible with USB 2.0 and 1.1. (Note: Each interface can provide 900mA current)