Feature:1. 4 ports USB 2.0 high speed ports2. Fully compliant with USB 2.0 specification3. Supports up to 127 hi-speed devices4. Supports data transfer rate at 1.5， 12 and 480Mbps5. Individual port over-current protection6. Friendly and ergonomic design， portable7. Provide up to 500mA per port sufficient for diverse devices8. Plug-and-Play installation9. Supports Windows98， 98SE， 2000， ME， XP， W7， OS 8.6 or above10. Hi-speed downstream ports with USB a female connectors