Aluratek 4 Port USB 3.0 Hub with Power Adapter (AUH1304F) USB Hubs from Aluratek provide the easiest way to expand your connectivity for your desktop or laptop. With the ever-increasing number of USB devices such as MP3 players, printers, scanners, and external hard drives, you always need more USB ports for your computer. With Hi-Speed USB 2.0 (480Mbps), USB 3.0 and 3.1 (5Gbps) you will able to transfer or backup your digital content in no time. Aluratek USB hubs come in 3-port, 4-port, 7-port or 10-port configurations allowing for easy expansion and addition of USB devices to your laptop or desktop. High-speed USB 2.0 with data transfer rate up to 480 Mbps is 40 times faster than USB 1.1, letting you make backups and access your content faster. SuperSpeed USB 3.0 / 3.1 offers up to 5Gbps--10X faster than USB 2.0. USB hubs are completely plug-and-play, ready to go right out of the box. They're bus powered from your USB port, with no external power adapter needed, and the hubs are fully backward-compatible with USB 3.0, USB 2.0 or USB 1.1 devices.