It is made of high temperature resistant high-quality ABS plastic, and the surface is finely frosted.Fully compliant with USB3.0 specifications, output is USB3.0 type B, input is USB3.0, 4-port type A supports USB3.0 to serial interface devices, and the transmission speed is up to 5G/s (backward with USB2.0)The appearance design is generous, the interface layout is reasonable, and does not interfere with each otherThe chip adopts Taiwan chip: GL3520USB3.0. interface supports hot insertion, plug and play; simple to and easy to carrySupport overload voltage and instantaneous current protection functions, effectively the connected equipment and the HUB itselfExternal supply, the interface is -USB interface.System Support: with Windows 2000/XP/VISTA /Windows 7/for OS 9.X/10.X /LinuxDifferent batches, product appearance may be different, does not affectColour:blackMaterial:ABS plasticSize:Line length: about 30cmPackage Contents:1 x USB HUBOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.