FEATURES - The USB 2.0 4-Port High Speed Hub enables you to add up to 4 additional USB devices. Fully plug and play, devices can be hot-swapped, supports USB over-current protection. Requires no driver installation COMPATIBILITY - Forwards and backwards compatible with all USB 3.0, 2.0, or 1.1 host controllers and devices on Windows, Mac, and Linux/Unix computers at USB 2.0 speeds up to 480 Mbps. DESIGN - Master blue power LED. Sleek piano black glossy finish. Compact and portable design NOTES - Some Apple devices such as SuperDrive will not work when connected through any USB hub. Charge and sync only works with BC 1.1 compatible devices 2 YEAR WARRANTY - We love our Plugable products, and hope you will too. All of our products are backed with a 2-year limited parts and labor warranty as well as Seattle-based email support