USB 3.0 HUB Multi USB Splitter 7 Port Expander Multiple USB 3 Hab Use Power Adapter USB3.0 Hub with Switch For PC

(1)Do not used for charging , it is used for offering more usb ports to Transfer file

(2)The specification of the power supply is 3.5*1.35mm  5V 1A,  it support  less than 1TB hard disk , if your hard disk is  more than 1TB , then the power supply not suit you

(3) 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(4) The power supply  can improve the usb transmission speed, insufficient power supply will lead to reduced data transmission, error code, with power can improve reliability.Features1. 100% and high quality2. Hot plug & play USB device3. Fully compatible with USB specification version 3.04. With blue LED for power5. ON/OFF switches activate or deactivate individual ports6. Designed with 4-por,this compact USB 3.0 high-speed hub is small enough for travel,and cable enough to meet your connectivity needsSpecificationsItem Name:USB HUB 3.0USB Ports:7 Cable:USB 3.0 HUB is  About 605mmSize:104*35*21mm, 164*35*21mmDate Transfer Rate:Upto 5GbpsColor:Black

Compatible: WindowsXP/Vista/7 and MAC OS 9.1 or higher