Usb Hub 3.0 Hub Usb Splitter Several Ports Multi Usb Hub 3.0 Hab power Adapter Extensor Computer Acceories switch USB For Home Specification Item Name: USB HUB 3.0 / 2.0USB Ports: 4,7Cable: USB 3.0 About 605mm,USB 2.0About 400mmData Transfer Rate:Upto 5Gbps/480mbpsColor: BlackCompatible: WindowsXP/Vista/7 and MAC OS 9.1 or higher Note (1)Not used for charging, it is used to provide more usb ports to transfer files.(2) The power supply specification is 3.5*1.35mm 5V 1A, and supports hard drives below 1TB. If your hard drive is larger than 1TB, then the power supply is not suitable for you.(3) This link has 9 options, if you want USB 3.0 with power supply, please select the correct option you need.(4) The power supply can solve the problem of insufficient power supply. If you need to work with a hard disk, then you should choose a power supply. Please note that please do not use more than two hard disks at the same time.(5) The power supply can increase the USB transmiion speed, and the insufficient power supply will cause the data transmiion to be reduced, garbled codes, and the power supply can improve the reliability. Notes: Due to differences between different monitors, the pictures may not reflect the actual color of the item. Compare the detail size with your size, please allow 1-3cm error due to manual measurement. If there is a problem with the product, please leave a meage before giving bad feedback. Thanks for your understanding. Specifications: Feature: NEW QUALITY: 100% new and high quality product for home or profeional use Portable: Lightweight and easy to carry Easy to use: The notebook has only two USB ports, and there is no place for a USB flash drive after plugging in the mouse and camera. Bringing a USB hub is more convenient Recommended use: The usb interface of the desktop computer is generally at the back, and it is very tiring to bend over to plug and unplug. Connecting the USB hub to the back, we can use the USB device directly on the front of the host. High practicality: Get rid of the trouble of overcrowded USB ports. The design of this one is very beautiful. The independent USB sockets are separated from each other, avoiding the crowding of some large USB devices, which is practical and convenient.