Plugable USB 2.0 2-Port High Speed Ultra Compact Hub/Splitter (480 Mbit/s, USB 2.0 Windows, Linux, OS X, Chrome OS) Plugable USB 2.0 2-Port High Speed Hub. USB bus powered, requires no additional AC power. This hub is intended for low or self powered devices. Example: Connecting two external hard drives will result in one or both failing to operate. *USB HUB IS NOT FOR CHARGING*. Functions as a USB hub only and will NOT charge mobile or any other devices. No special charging functionality for charging an iPad, iPhone, or other tablet and smartphone devices with or without a PC connected. Not BC Hub enables connecting 2 additional USB devices to a single USB port. Works with USB 3.0, 2.0, or 1.1 host controllers and devices on Windows, Mac, and Linux/Unix computers at USB 2.0 speeds. Transfer rates are device and USB host controller dependen Sleek piano black finish. Ultra compact, travel friendly design with a built-in 12-inch USB cable. Apple notes: Note that sume Apple devices such as the Apple SuperDrive look for Apple-specific signaling and will not work when connected through any USB hub.