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 900mASales Attributes Color：Black General Brand：N/A Quantity：1 Piece Material：Plastic Specification Indicator Light：No Port Number：4 Spacing：0.6cm Current Output：With Switch Control：No Interface：USB 3.0，USB 2.0 <img src="http://112.74.112.28/down/products/291362/291362_000.JPG">