Go2Link Aluminium Multi Port 4 Ports USB 3.0 Hub with 1 Charging Port for Imac, Macbook Air, or Any Pc or Ultrabooks Windows 8 Tablets SUPER SPEED: Data transfer rate up to 5Gbps. MULTI-FUNCTIONAL: 1 port offers to charge and 4 ports for transfer data. EASY to USE: Plug&play and hot swapping. CONVENIENT: The on/off switch is more convenient. PRACTICAL&PORTABLE: Sleek compact design and high performance .