Fulfillment by Amazon (FBA) is a service we offer sellers that lets them store their products in Amazon's fulfillment centers, and we directly pack, ship, and provide customer service for these products. Something we hope you'll especially enjoy: FBA items qualify for FREE Shipping and Amazon Prime.If you're a seller, Fulfillment by Amazon can help you grow your business. Learn more about the program. Turning the USB-A port of your laptop into 3 USB 2.0 ports, providing stable and reliable network environment. Compatible with Mac OS, Chrome OS, Linux OS and Windows 10/8.1/8/7/Vista/XP. The RJ45 ethernet port provides 10/100M BASE-T performance for gaming, browsing in daily use for work or entertainment. Slim design saves your desk space, this hub is handy and portable to carry for office, school or travelling.