D-Link USB Enet Adapter with 3 Port USB Hub (1 RJ45 1 USB B 3 USB A) Provides 3 USB ports (Type A) for connection to downstream devices Provides 1 UTP RJ-45 Ethernet or Fast Ethernet port (depending on model) Provides 1 USB port (Type B) for connection to upstream PC or USB hub User selectable self-power or bus-power (AC adapter provided)