USB 3.0 Hub USB Hub 3.0 Multi USB Splitter 3 Hab Use Power Adapter 4 Port Multiple Expander USB3 Hub with Switch for PC

(1)DO not used for charging,it is used for offering more usb to transfer file. (2) The power supply can solve the problem of insufficient power supply, if you need work with a hard disk , then you should choose the with power supply , and please note ,please don't use more than 2 hard disk at the same time (3) The power supply can improve the usb transmission speed 1.Thespecification of the power supply is 3.5*1.35mm, 5V 2A. 2.Hot & play USB device 3. Fully compatible with USB specification version 3.0 4.With blue LED for power 5. ON/OFF switches activate or deactivate individual 6.Designed with 4-port,7-port,this compact USB3.0 high-speed hub is small enough for travel,and cable enough to meet your connectivity needs Item Name:USB HUB 3.0 USB:4 Cable:USB 3.0 About 605mm Size:104*35*21mm Data Transfer Rate:Upto 5Gbps/480mbps Compatible: XP/Vista/7 and OS 9.1 or higher Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-3cm measuring deviation due to manual measurement. Package Included:1 x USB Hub