Plugable 4-Port USB 3.0 Portable Bus Powered Hub (VIA VL812 Rev B2 Chipset with v9091 firmware, Windows, Mac OS X, and Linux support, full USB 2.0 backwards compatibility) Expand USB connectivity by connecting up to 4 USB 3.0, 2.0, or 1.1 devices to any USB 2.0 or 3.0 capable computer. Fully plug and play, devices can be hot-plugged, supports USB over-current protection. Compatible with most Windows 10, 8.1, 8, 7, Vista, XP, Mac OS X, and Linux / Unix systems. Microsoft Windows systems should install latest manufacturer USB 3.0 host controller drivers and Windows Updates. Apple Mac OS X and Linux / Unix systems require latest operating system updates for best compatibility. Hub is not a standalone charger and will not charge phones or tablets. Apple notes: Some devices such as the Apple SuperDrive look for Apple-specific signaling and will not work when connected through any USB hub. Not recommended for use with USB 3.0 PCI-e add-on cards for older Mac Pro systems because of limitations in their software support for USB 3.0 hubs. USB bus powered operation, no power supply / AC adapter required. Sleek piano black glossy finish. All 3 USB ports on one side to minimize cable clutter and maximize accessibility. Master blue power LED. Sleek piano black glossy finish in a compact portable form factor. Three of the four USB ports are on one side to minimize cable clutter and maximize accessibility.