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 MAC8.6 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, easily protection

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