1) Expand four USB port, supply up 500MA, current per port 2) No external power supply 3) Driverless, hot plug & play 4) Internal over current protection circuits 5) Chains up to 127 USB devices 6) Compatible windows 95/98/2000/xp or MAC 8.6 above Features: 1) Adds 4 USB 2.0 Hi-Speed ports, backwards compatible with 1.1 2) Fully compliant with USB 2.0 Specification 3) Supports data transfer rate at 1.5/12/480 mb/s 4) Friendly & ergonomic design, easy to protect 5) Plug & play installation 6) Top-loading 7) Individual port over-current protection, friendly ergonomic design, easily portable 8) Hi-speed downstream ports with USB A Female connectors 9) 1 Hi-speed upstream ports with Mini USB 5P jack

http://olla.gr/4-ports-usb-hub-2.0-usb-splitter-adapter-with-anti-dust-cup-black/