that hub will only power a max of 4 devices (and that might even be iffy), because it is a 5V 2A power adapter on it.  you need to have 2.5VA per device.  so for example if the adapter says 5V 3A then you can power 15VA worth of devices which = 15/2.5 = 6.  you really have to be careful with the usb hubs cause you could potentially mess up a device or computer if overloaded.  I bought some shitty ones off amazon that were 7-port and supposed to have a 2.5A adapter but they wouldnt power more than 3 devices.  so best to go with something that have been tried with good success.