Powered through a PC's USB port, so there's no need to find a spare power outlet. - 10-/100-Mbps ports are autosensing for speed and duplex. - A quick way to build a small network or add ports to an existing network. - Can be powered through a PC's USB port so there's no need to find a spare outlet. Or use the included AC power supply. - Auto MDI/MDI-X.