Toshiba USB 3.0 4-Port Hub

The description copied and pasted directly from shows the same asterisks says

does not require any additional AC adapter*


No software needed, drivers or external power* needed

What I don’t get is what does the asterisks mean and CAN you provide external power if you want? Images of the hub elsewhere don’t show all the sides so I don’t know if you can supply an adapter to make sure you got enough power to supply some of those heavy items.