Anker Ultra Slim 4-Port 3.0 Data Hub Connect your USB drives, peripherals and more. More Ports Turn one of your computer ' s USB ports into four. SuperSpeed Data Transfer, Transfer data at speeds of up to 5 Gbps. Ultra Portable Weighing about an ounce and super small, this Anker Ultra Slim Hub is designs to be as portable as possible. Extra Durable A reinforced built-in cable, sturdy exterior and heat-resistant connectors give this hub incredible durability. System Requirements: Windows 8 / 7 / Vista / XP, Mac OS X 10.2 (and above) Mac OS X Lion 10.7.4 users should upgrade to Mountain Lion 10.8.2 or later to avoid unstable connections. Compatibility:2.4 GHz wireless devices, MIDI devices and some USB 3.0 devices may not be supported. Try using the host port or a USB 2.0 connection. Power Usage: For a stable connection, avoid connecting high power-consumption devices, such as external hard drives. The hub will sync but not charge tablets and other devices that require a higher power input.