Multiple USB Ports: This USB 2.0 hub can expand 1 USB 2.0 port to 7 extra USB 2.0 data ports for hard drives or other USB devices, which can be used at the same time. Independent switch and LED: Each port has its own independent switch, 7 blue LED indicators indicate power and USB connection status. Smart Protection: The USB hub has built-in surge protection. Overvoltage, overcurrent, short circuit, overheating and reverse current. So your USB hub always protects itself and all connected devices. Wide Compatibility: Support various different interfaces, such as Windows 10.7, Vista, XP, 2000/ Mac OS X 10.2 and above/Linux 9. NOTE: This hub must be connected to a computer for other devices to use it. It is not intended to be used as a stand-alone charger, but simply to extend the computer and USB ports. It may not be able to power high power demanding devices such as tablets.