Add four external USB 3.0 ports to your notebook or Ultrabook with a slim portable hub;Compatible with MacBook Pro / MacBook Air;Ideal for Ultrabook and Laptop users with limited USB 3.0 ports;Laptop accessory adding high speed USB 3.0 ports;Connect peripherals and external hard drives or flash drives in the home or office;Built-in cable;Portable 4 Port USB 3.0 Hub / Compact USB Hub with Cable / USB 3.0 Hub w/ Attached Cable;Mobile USB Travel Hub / Notebook and Laptop USB 3.0 Hub