Add three usb 3 0 ports 5gbps and a gb e port to your mac book using this silver apple style hub with an extended length cable 3 port portable usb 3 0 hub plus gigabit ethernet built in cable aluminum and compact usb hub with gigabit ethernet adapter silver usb 3 hub perfect for mac book rugged design and travel friendly usb 3 0 hub with rj45 network port for mac matches your mac book pro or mac book air use with ultrabook laptops usb powered so you can carry it anywhere