The 4-Port USB 3.0 + 1-Port Charging Hub is offering 4 extension ports for USB 3.0 + 1 fast charging USB port. You can get easy to charge your mobile device (iPad/iPhone/Samsung/HTC) rapidly. This device is also backwards compatible with both USB 1.1 and USB 2.0 specifications. With the speed advantage of USB 3.0, it offers a theoretical data transfer speed up to 5.0GBit/s. That's ten times faster than the USB 2.0 speed of 480MBit/s. It is a perfect USB 3.0 hub for everyone.