The HooToo HT-UH002 SuperSpeed USB 3.0 Hub provides 4 additional USB 3.0 ports for your PC, allowing you to connect USB devices such as external storage, digital cameras, printers, and more. It could be bus-powered or used with a provided power adapter for high current consumption devices. Aluminum design is good for heat dissipating. Specifications: - USB Ports: 4 USB 3.0 Ports; - Power: 5V/2A Power Adapter; - Current Protection: Built-in circuit; - Transfer Rate: up to 5 Gbps - actual transmission speed varies from connected devices; - humanization design: Antiskid pads at the bottom of the hub; Operation Environment: Windows 2000/XP/Vista/7/8. Mac OS 9.1 or above (Mac Mini Excluded) *We recommend Apple users using this hub on host USB 3.0 ports for stable performance Package Includes: - 1 * 4 port USB 3.0 hub; - 1 * USB data cable; (3.3 ft) - 1 * 5V/2A power adapter; - 1 * User Manual.; Note: - Some devices require direct connections to host USB 3.0 ports on computer, such as some hard drives, 2.4 GHz wireless keyboard or mouse adapters. - This hub is not a standalone charger; it won"t charge ipad, iphone or other non-standard charging devices. We guarantee this product with 12 months warranty so if there are any problems welcome to contact Sunvalleytek for technical support or RMA process.