DESC: Diamond Superspeed USB 3.0 4-Port Hub:Compliant with all USB 3.0/2.0/1.1 specificationsThe advanced design keeps optimal speeds when using multiple USB devices simultaneouslyAutomatic self-power status monitoringPlug-and-Play function1 upstream port and 4 downstream portsIncreased power efficiencyQuicker charge time for your mp3 players, digital cameras and cell phonesUp to 10 times faster throughput over USB 2.