Features: brand new and high quality One USB interface expands into 4 independent 4 USB interfaces, which are compact, practical and convenient. Each power supply can reach up to 500MA. It is directly connected to the computer, no external power supply, no driver, plug and for play, support hot swap, simple and easy to use. Adopt the second generation USB HUB controller. USB2.0 interface, support USB1.0/1.1/2.0, transmission speed 1.5/12/480MBPS. Built-in current overload short-circuit for protection device. System support: Win95/98/Me/2000/XP, Linux2.4andMac os8.5 or above. Streamlined miniature design. Supports up to 127 usb devices. Use high-quality electronic components to ensure stable operation. Specifications: Material: ABS Transmission rate: 480Mbps Number of interfaces: USB 2.0 x 4 Cable length: approx. 12cm/4.72in Interface: USB 2.0 / Type-C (optional) Size: approx.7.1x4x0.8cm/2.80x1.57x0.31in Color: Black Package Includes: 1PC x 1 to 4 USB Hub note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!