There is one USB 3.0 hub and three USB 2.0 hubs in this docking station, making larger data transfers easier and providing a good solution to the problem of the number of USB ports. As this splitter supports simultaneous connection of multiple ports, such as keyboard, mouse, U disk and mobile hard drive, it easily relieves office anxiety. It is constructed of PVC material. The length of this product is 23.5cm, the width is 1.2cm and the height is 0.8cm. It is suitable for Windows, for Mac OS, for Android system, etc. Item Name: USB Hub Material: PVC Features: Plug Play, Stable Output, High-Efficiency Interface: 3xUSB2.0+1xUSB3.0 Compatible: for Windows, for Mac OS, for Android Size Details: L: 23.5cm/9.25", W: 1.2cm/0.47", H: 0.8cm/0.31" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x USB Hub