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, can be used at the same time. INDIVIDUAL SWITCHES & LEDS: Every port has its own individual switches, 7 blue LED indicators indicate the power and USB connection status. INTELLIGENT PROTECTION: USB Hub has built-in surge protection. Over-Voltage ,Over-Current ,Short Circuit,Over-Heating and Counter-Current.Thus, your USB Hub always protects itself and all your connected devices. WIDE COMPATIBILITY: Supports various different interfaces such as Windows 10.7, Vista, XP, 2000/ Mac OS X 10.2 and higher/ Linux 9. NOTE: This hub must be connected to a computer for use by other devices. It is not meant to serve as a stand-alone charger, but merely expands the computer's USB interface. It may not be able to power high-power-demand devices such as tablets.