Features:- No power supply is required, as it is powered by USB- Compatible with Windows and Mac OS- Instantly connect up to 4 devices: keyboards, mouses, external drives, mobile phones, printers, and more- Up to 480 mbps transfer speeds- Individual port over-current protection- Are you running out of USB ports on your computer or laptop? Not with the Pivot Series USB hub- Now you have additional USB ports for all of those extra devicesWhat's in the box1 x 4-Port USB Hub