A USB hub is a small, lightweight unit with multiple ports for plugging in USB devices. We Alxum offer different type of usb hub for your continent using in USB devices. It is commonly connected to a USB port located on the back of a desktop computer using an extension cable. Once the hub is plugged in, the user can set it wherever is convenient, avoiding the hassle of accessing the rear of the system. A hub is also great for laptops with only one or two ports, which's great for movement working.