5 This USB hub has 4 USB ports allowing 4 devices transfer data at the same time. Pocket size makes the hub cute and easy to carry. 5Gbps maximum data transfer rate creates you fast data transfer experience. It supports different kinds of devices from 2TB hard drive to USB 2.0 / 1.1. It will be a good helper to extend a USB port to 4.  Features:  USB 3.0 up to 5Gbps maximum data transfer rate.  4 ports allow 4 devices work at the same time.  Support 2TB hard drive.  Portable: Small and light， mini size.  Easy to use: Plug-and-Play， no driver installation required.  Specifications:  Interface type: USB 2.0  USB ports quantity: 4  USB ports output: 5V/ 900mA  USB ports input: 5V/ 900mA  Power ports quantity: 1  Power ports input: 5V / 500mA-3500mA  Fully compatible: USB 3.0 / 5Gbps  Backwards compatible: USB 1.1 / 12mbps， USB 2.0 / 480mbps  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: 11.2 * 3.0 * 2.5cm / 4.4 * 1.2 * 1.0in  Cable length: 97.0cm / 38.2in  Item weight: 72.0g / 2.6oz  Package size: 21.0 * 14.2 * 3.5cm / 8.3 * 5.6 * 1.4in（L * W * H）  Package weight: 110.0g / 3.9oz  Note:  1. This USB hub can not charge devices.  2. When using high power devices， please connect to power adapter.  Package list:  1 * USB hub