Features: brand new and high quality One USB interface expands into 4 independent 4 USB interfaces, small, practical and convenient. It is directly connected to the computer, no external power supply, no driver, plug and for play. Support USB3.0 super speed (5Gbps) transmission, downward compatible USB2.0 Independent supply provides power supply to connect devices. Built-in current overload short-circuit, anti-overvoltage ,anti-short circuit protections The devices connected to the 3-port USB 3.0 hub, with 5Gbps fast transfer speed Specifications: Material:ABS Weight:58g Connector Type: USB 3.0 USB Ports:4 Working Voltage: 5V Colour: Black Material: ABS Switch: Each Port Corresponds to A Switch, and With Indicator Light Cable Length: 150mm/5.9in Function: Usb3.0x4 Bare Machine Size: Approx 108x45x14mm/4.25x1.77x0.55in Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Package includes: 1 x USB Hub