Features: 1.Unique card opening design, convenient and energy-saving2.4-port USB interface hot plug-and-play, easy to use3.The length of connecting wire is 30cm, which is flexible and convenient to use.4.Overload voltage and instantaneous current protection function to effectively connected equipment and HUB itself5.The theoretical transmission rate of USB3.0 interface is as high as 5Gbps, and it is downward compatible with USB2.0/USB1.1. Driver-free /7/8 with USBFunction:1.It is equipped with high-performance main control chip and expands 4 USB (1 USB3.0 + 3 USB2.0) high-speed interfaces.2.It has continuous working and safe and stable transmission performance. With advanced USB PHY technology, each interface can run at a theoretical 5 Gbps transmission rate at full speed under different topology and channel conditions, and the transmission is safe and stable.Product Specifications:Product name: 4-port USB high-speed hubProduct interface: one USB3.0+3 USB2.0Product color: silverMaterial: aluminum alloyPackage Contents:1 x USB HUBOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.