USB 3.0 4 Port Aluminum Hub is used for the expansion of the computer. It has 4 USB ports, convenient the connection between USB products and the laptop. It is plug and play with hot swapping support, functional and convenient to use. 4 USB 3.0 port extension, allows users to add 4 USB devices for your computer in seconds. Quick Sync: Transmit data via USB at up to 5Gbps, fast enough to transfer a movie in seconds, no more wait times when sending and receiving important files. Versatile and Compact: Stick your desk or wall, or take it with you on the go. Easily slips into a pocket or bag for easy transportation. Specification: Material: Aluminum Alloy Transmission Speed: 5Gbps Size Chart: 98x54x26mm/3.86x2.13x1.02inch Package Includes: 1x 4 Port USB 3.0 Hub Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!