DATA TRANSFER AND CHARGING - Plugable’s USB 2.0 7-Port High-Speed Hub adds 7 additional data transfer and charging ports to your laptop, or use as a stand-alone charging hub COMPATIBILITY - This powered USB hub is compatible with Windows, macOS, and Linux/Unix computers at USB 2.0 speeds up to 480Mbps. Also operates as a stand-alone USB charging hub DESIGN - As a USB hub for laptops, the stackable design lets you add USB data and charging ports in a compact footprint. Or, use as a stand-alone charging hub RECOMMENDED USE - At home it’s a USB hub for laptops, or a charging station for multiple devices. At school, stack several to easily charge and sync student devices. In big operations, deploy as many hubs as you needed test and charge at high volume 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