4 Port USB Powerd HUB with it's own 5V 3A US power adapter,it can charge your phone even if the computer is off. It's will transfer rates up to 5Gbps (500MBps) to allow data to move quickly between devices. 1 Smart Charging Port(Max.2.4A) at the bottom for charging your phone/tablet/camera etc,recognise your device automatically and provides a corresponding current. USB 3.0 cable length: 100 cm / 39 inches, long enough and can be connected to the back USB 3.0 port of the desktop Sleek piano black glossy UV clear coat finish designed with Individual On/Off Port. If you want to turn off one of this 4 port, just need press and hold the switch button on about 3 seconds. Turn on the usb port: tap the button Smart USB 3.0 hub, it will remember which ports are switched on or off when powered down and keep that config at power up. No drivers required, compatible with Windows XP / Vista / 7 / 8 / 8.1 / 10 / 10.1, Apple Mac OS X 10.2 or above, Linux 9 or above Solid construction,