The compact Dyconn 4 Port USB 3.0 Power Hub is the perfect companion for those who are looking to expand the usability of a single USB computer port. The Dyconn 4 Port USB 3.0 Power Hub lets you connect up to 4 devices quickly and easily. You can enjoy fast device connections such as external hard-drives- media readers- iPods- among other accessories. The Dyconn 4 Port USB 3.0 Power Hub may be small in size- but is highly durable as it is powerful- due to its strong- oxidized aluminum outer casing.Features:4 Super Speed USB 3.0 Ports.Plug and Play Installation.High Power Output (900mAh).Super High-Speed Data Transfer Rate - Up to 5Gbps.High Compatibility Product Range.Backwards Compatible with USB 2.0.Hot-Swap Capability.Auto Voltage Balancing to Provide Sufficient Bus Power to Each Port.Specifications:4 External Ports - USB 3.0 (Supports USB 2.0).Max Data Transfer Rate - USB 3.0 (Up to 5Gbps)- USB 2.0 (Up to 480Mbps).Input - DC5V/3A.Output - USB: DC5V/900mAh.OS Compatibility - Windows XP/Vista/Windows 7- Mac OS X v10.1Dimension - 1.7 W x .6 H x 3.14 D in.Packages Content:USB 3.0 Power Hub.USB 3.0 Cable.5V/3A Power Adapter.Instruction Guide.