?Package Contents?: 1* usb 3.0 hub, one-year friendly customer service. UFBOSS offers 100% money back for quality problem within 30 days and a 12-month warranty. Quick reply within 24h, please feel free to contact us if you have any questions. ?Ultra Slim Design?: Ultra slim design for laptop, small enough to be functional without taking up tons of space, a good helper for business trips and office. (Size: 3.94*1.18*0.39inches). ?USB Hub?: USB ports 3.0 hub, expand one USB port of the computer to four USB ports, plug and play, no need to install driver. ?Super Speed Data Transfer? : With super-speed USB 3.0, you can now transfer data 10 times faster than older USB 2.0 standards, transfer an HD movie in seconds. ?High Compatibility?: USB 3.0 port USB Hub applies to USB-A Laptops, like:Macbook, Mac Pro/mini, iMac, Chrome, Linux OS, Surface Pro, XPS, Notebook PC, USB Flash Drives, Mobile, and More.