The BYTECC U3H-700 USB hub instantly adds up to seven USB ports - three USB 3.0 and four USB 2.0 - to your computer, great for slim notebook or Ultrabook with less than enough USB connectivity. You can hook up various peripherals, like USB flash drive, external HDD, printer and more, without the worry of running out of onboard ports. Each port has an LED indicator to display status. An AC adapter is included to provide enough power when power-hungray device or multiple peripherals are connected. Compliant with USB 3.0 & 2.0 specifications Adds three SuperSpeed USB 3.0 & four USB 2.0 ports for your USB devices Supports USB Low-speed ( 1.5M bps) / Full-speed (12Mbps) / High-speed (480Mbps) / Super-speed (5Gbps) Advanced design keeps optimal speeds when using multiple USB devices simultaneously Self-power Plug & play