This USB hub has 4 USB ports allowing 4 devices transfer data at the same time. Slope surface design helps you plug in easily. Mini size makes the hubs portable. It will be a good partner when you traveling.  Features:  4 USB ports allowing 4 devices transfer data at the same time.  Slope surface design: Easier to use.  Mini size: Only 8.8cm / 3.5in in length and 46.0g / 1.6oz in weight.  Support 1TB hard disk.  Plug and play， no drivers required.  Specifications:  Interface type: USB 2.0  Maximum data transfer rate: 480mbps  USB ports quantity: 4  Output: 5V/ 500mA  Input: 5V/ 500mA  Compatible modes:  For Windows 95 / 98 / 2000 / 2003 / ME / XP / Vista / Win 7 / 8 Mac OS 9.1 and above.  Compatible with USB 1.1.  Color: Silver  Material: Aluminum alloy  Item size: 8.8 * 3.5 * 2.2cm / 3.5 * 1.4 * 0.9in  Cable length: 15.3cm / 6.0in  Item weight: 46.0g / 1.6oz  Package size: 14.0 *9.0 * 2.0cm / 5.5 * 3.5 * 0.8in（L * W * H）  Package weight: 48.0g / 1.7oz  Note:  1. To ensure a stable connection， don't use this hub with high power consumption devices， such as some large-capacity hard drives.  2. Windows 95 / 98 require driver install.  3. Laptop， phone， lamp and cable in the pictures are not included.  Package list:  1 * USB hub