This USB 3.0 extension hub is designed with 4 ports, it is a practical tool to use when there are no enough ports on a computer. This 1 to 4 USB adapter features data transmission and charging function, and has a LED indicator light. The 4-port USB splitter features USB 3.0 that can provide 5Gbps high speed, let you can transfer data faster. The USB 3.0 splitter is convenient to use and needs no drivers, just connect and use and is compatible with most types of computer OS. The 4-port USB hub is safe to use, the over-current and instant current protection can protect the USB hub and the connected devices. Specifications: USB ports: 4. Cable length: 25-35cm. Size: 104x37x24mm. Data transmission speed: Up to 5Gbps. Color: Black, white. Compatible OS: Replacement for Windows 2K/XP/Vista/Win7, replacement for Linux, replacement for MAC OS 9.1 or above. Note: There might be a bit color distortions due to different computer resolutions. There might be a slight errors due to different hand measurement. Package included: 1x USB hub.