@nhanquy
Yes it does come with an external AC adapter that plugs in the end - 5V@1A and I used it. I also tried the trick that the others have suggested by using an external battery pack - not the same as pictured but same concept. Nothing seems to work although any of these methods work fine on my other Linux machines so I know it's not incompatibility. The whole things works if I use my 1GB usb flash on the NIT with or without the powered hub. Not giving up yet because I know it should work fine...

C