In general, our computer only has three usb ports, let's make an assumption, one for a mouse, one for keyboard, one for U disk, well, it’s full. You will feel a little less of it if we want to using a port to charge our phone. At now we need this USB 3.0 hub, it can help extend the additional three USB interface, weighing about an ounce and super small, this USB Hub is designed to be as portable as possible. A reinforced built-in cable, sturdy exterior and heat-resistant connectors give this hub incredible durability. USB 3.0 port means that it can transfer data at speeds of 5 Gbps. That's fast enough to transfer a full HD movie in just seconds! And there is a spare USB power interface, it support for 5V1A/5V2A/5V4A android phone charger.