Features: brand new and high quality Provides 4 USB2.0 ports, each output port has an independent power switch control, which can avoid frequent plugging and unplugging, and it is more convenient to use and manage. Built-in current overload short-circuit for protection device, support overload voltage and instantaneous current for protection functions, safe and convenient to use. Use high-quality electronic equipment to ensure stable operation. Using LED lights, the working status is intuitively visible. The computer automatically recognizes and installs, no driver is needed, plug and for play. Support system: Windows7/XP/200/ME/98/Vista, etc. Specifications: Material: Plastic + Metal Weight: 50g Size: 10.4x3.5x2.1cm/4.09x1.38x0.83inch Color: Black/White Interface Type: USB 2.0 Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x USB Hub