Feature: 1 upstream and 4 downstream USB port included, fully compliant with USB specification version 3.0 / 2.0; Hot plug & play USB; Device Specifications: Interface: USB 3.0, Compatible with USB 2.0 and 1.1; Data transfer rate: 1.5Mbps / 12Mbps / 480Mbps up to 5Gbps; Bus-power limit current protection 500mA to 900mA