The ST4300PBU3 4 Port Portable SuperSpeed USB 3.0 Hub with Built-in Cable turns a single USB 3.0 port into four so you can connect more peripherals. The integrated cable avoids the need to carry an extra cable, plus the hub is USB-powered for easy transport when you're on the go. Great for adding extra ports to your Ultrabook, tablet or Macbook, this portable usb hub offers a block-style design with ports across top of the hub so devices like USB keys or wireless keyboard/mouse receivers sit upright on the desk. Or, the hub can be laid on its side for easy cable connections to devices like external hard drives or printers. The four port USB 3 hub supports USB 3.0 data rates (5 Gbps - up to 10x more than USB 2.0) and is backward compatible with USB 2.0 and 1.1 devices, for simultaneous connection to new and legacy devices. Backed by a StarTech.com 2-year warranty and free lifetime technical support.