Brand new and high quality. Portable size, Compact, light weight design. Plug and play, no driver installation required. Fully compliant with USB 3.0/2.0/ 1.1. Supports data transfer rate up to 5Gbps. Expand 3 USB ports supply up to 500mA current per port. Use high performance electronic part to ensure stable product operation. Support downstream wrong signal detection and revert to normal function. Through the LED indicator,you can easily monitor the connection condition. Power consumption, low operating temperature so solts and slots without interfere with each other. Allows simultaneous operation of up to 3 separate devices all attached to a single USB port. USB A male connector can be rotated 180 degrees, easily meeting users orientation angle demands. Supports Win ME/ Vista/ XP/ 2000//Win 7 MacOS 10.4.5/ Linux 2.4.1 and so on. The product is suitable for U disk, card reader, USB mouse, USB keyboard, scanner, digital camera. Specifications: Material: Aluminum Alloy+ABS Color: Black, White, Grey, Silver Transport Interface: USB3.0 Transmission Rate: Maximum up to 5Gbps Operating system: Win95/98SE/Me/2000/XP/7/8/10/vista, Linux, Mac OS 8.5 and above. Power Supply: USB 5V/600ma Usage Temperature: 0 -70 Storage Temperature: 10 -90 Size: Approx. 64*16*17mm/2.52*0.63*0.67inch Package included: 1 x USB Hub Note: Due to the manual measurement and different measurement methods, please allow 1-3cm deviation.Thanks!