Tcoolgroup Robot Hi-Speed 4-Port USB Hub for Windows XP / Vista / 7 / 8 / Linux / Mac OS /Desktop PC / Laptop(including a MINI-USB cable) &#x2714; Stackable, reversible design compatible with USB 2.0 and 1.1 &#x2714; 4 high-speed 480Mbps downstream ports, convenient plug-and-play installation &#x2714; Enables hot-swapping, allows cascading for use with up to 127 USB devices &#x2714; Over-current protection guards your computer and peripherals &#x2714; Friendly & Ergonomic design easily portable