The listing, D-Link 4 port USB 2.0 powered hub, power cord and mini USB cable included. has ended.
This is a four-port powered USB hub from D-Link which includes the 5 volt 2.5 amp power supply as well as a mini USB type B to USB type A cable.
Powered USB hubs have a number of advantages over their non-powered counterparts.
A powered USB hub does not rely on your personal computer's internal power supply to generate power, instead they received their power from an AC adapter that is connected to the hub and then plugged into an electrical outlet.
Powered USB hubs help to ensure the performance of your USB devices are not hindered by a lack of proper amperage. They're able to run many components at once, and help ensure power-hungry devices such as Wi-Fi antennas and portable USB hard drives are receiving adequate power.