Oyen Digital U3-HUB4-SL Aluminum USB 3.0 Powered 4-Port Hub for Apple Macbook Pro/Air/iMac/Mac Mini 4 Total Ports (3 Data Ports, 1 High-Power Charging Port) Superspeed USB 3.0 connection; also compatible with USB 2.0 Includes a high-power charging port dedicated for charging your iPad or other high power device Aluminum housing provides excellent protection and heat dissipation Powered by USB port; or included AC Power Adapter (needed if charging high power devices such as the iPad)