This USB hub has 4 USB ports allowing 4 devices transfer data at the same time. 480mbps transfer rate bring you high speed experience. This hub is easy to carry and easy to use for it is only 46.0g / 1.6oz and has no driver installation required. Switch is there for you to control the 4 ports， creating safety. It will be a good partner when you traveling.  Features:  Traffic light design: Looks interesting and special.  USB 2.0 4-ports allow 4 devices transfer data at the same time.  Support 1TB hard drive.  Safety: Switch to control the 4 ports.  Portable: Small and light.  Easy to use: Plug-and-play， no driver installation required.  Specifications:  Interface type: USB 2.0  Ports quantity: 4  Output: 5V/ 500mA  Input: 5V/ 500mA  Fully compliant: USB 2.0 / 480mbps  Backwards compatible: USB 1.1 / 12mbps  Support system: For Pentium processor-based computer with USB 2.0 port， for Windows 98 / SE / 2000 / Me / XP / Vista / 7， for Mac.  Color: Black， white (optional)  Material: ABS  Item size: 10.1 * 3.0 * 1.9cm / 4.0 * 1.2 * 0.7in（L * W * H）  Cable length: 57.5cm / 22.6in  Item weight: 46.0g / 1.6oz  Package size: 7.5 * 8.0 * 3.0cm / 3.0 * 3.1 * 1.2in（L * W * H）  Package weight: 77.0g / 2.7oz  Note: Laptop and U disks in pictures are not included.  Package list:  1 * USB hub