Anker&reg; Uspeed USB 3.0 4-Port Hub with Power Adapter, Compatible with Windows XP / Vista / 7 / 8 Mac OS - Ultra Slim 0.5inch Profile Slim and stylish design; Size: 854812mm. 4 SuperSpeed USB 3.0 ports support data transfer rates of up to 5Gbps. (Note: actual rate will depend on the capability of your device.) Backward compatible with USB 2.0 / 1.1. 4 USB 3.0 ports with built-in surge protector; Smart chip power management allows devices to communicate idle states and latency tolerance for progressively lower power states and subsequently increased performance and power efficiency. Supports Plug and Play and hot swapping. No installation of drivers required for Windows XP / Vista / 7 / 8 or Mac OS X 10.2 and above. Package includes: 1 USB 3.0 Hub, 1 5V / 2.5A power adapter, 1 USB 3.0 cable (Approx. 3ft), user manual. Free lifetime technical support and 18-month manufacturer's warranty.