Description: There is no need for any software, drivers or complicated installation process as this USB hub is plug-and-play. USB3.0 interface is the outstanding feature of this USB hub, so it can ensure high transfer speed up to 5Gbps. You can mount the USB hub on the grommet hole to make full use of space for desks. And it has 3 USB 3.0 ports, which can be used for data transmission to connect your mouse, keyboard, USB flash drive, hard drive, etc. Made of high quality ABS, it is lightweight, wear-resistant and durable to use. The top diameter is 6.9cm. The bottom diameter is 5.9cm. The height is 5cm. It is suitable for both home and office. Item Name: USB Hub Material: ABS Number of Ports: 3 x USB3.0 + TF/SD-Card Reader Transmission Speed: 5Gbps Features: Plug And Play, High Speed, Driver Free Size Details: Cable Length: 100cm/39.37" (Approx.) Top Diameter: 6.9cm/2.72"(Approx.) Bottom Diameter: 5.9cm/2.32" (Approx.) Height: 5cm/1.97" (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