High-speed data transmission USB 3.0 hub with data transfer rates of up to 5Gbps. Backward compatible with USB 2.0 and 1.1, perfect for transferring high-resolution images and video recordings to your computer faster and more efficiently. Aluminum hubs: USB 3.0 4/7 ports, easy to connect peripherals such as mice, keyboards, flash drives, card readers or an external hard drive to your laptop or Mac. Super Fast Data Transfer: USB 3.0 ports transfer photos, videos and music at up to 5Gbps, backwards compatible with USB 2.0 and 1.0. Plug and Play: Hot swapping. 20W (5V 4A) upgrade. The adapter ensures safe and stable data transfer for all connected devices. Compact and stylish: Smooth aluminum is perfect for Mac. The surface of the product with 7 USB 3.0 ports is made of aluminum alloy, which is small and beautiful, easy to carry, put in a bag or pocket.