1) 4 USB 1.1 ports a type female connectors

2) Downstream 1 USB b type male connector upstream with a cable

3) Support both full-speed 12Mb/sec and low-speed 1.5Mb/sec transfer rates

4) Chains up to 127 USB devices

5) Individual port over-current protection

6) Provide up to 500 mA per port sufficient for diverse devices

7) Truly plug & play automatic installation

8) DC jack for selectable