It is bus-powered hub, but it is very cheap and small and works after a small modding: Now there is common contacts: Tested on my Raspberry Pi. This is a 4-port switching hub that enables the "sharing" of up to four USB devices between two computers. Whilst it may be powered externally, it does take power from both connected computers. If one of them is, say, a netbook or laptop, that may provide sufficient extra power to enable the use[…]
