DYW1038 Features: * USB * 4 Super speed * Hot swap capability * Plug and play * Ideal for external hard drives, media readers, iPods and other accessories * Up to 5Gbps high speed data transfer rate * Auto voltage balancing to provide sufficient bus power to each port * 4 External ports: USB 3.0 (supports USB 2.0) * Maximum data transfer rate: USB 3.0 (Up to 5Gbps)/USB 2.0 (Up to 480Mbps) * High power output: 900mAh * OS Compatibility: Windows XP/vista/windows 7, Mac OS X v10.1+ Specifications: * USB 2.0 with backwards compatible * Input: DC5V/3A * USB Output: DC5V/900mAh Dimensions: * Overall dimensions: 1.7" H x 3.14" W x 6" D, 0.3 lbs