Hub USB 20 of 7 high-speed ports compatible with USB 20 and 11 Charge up to 7 devices at a time Data transfer speed 15Mbps 12 Mbps up to 480Mps Support 500GB HDD Dishes with semi-transparent space to see the light Led Blue Operating indicator With power boots on and off at each port Led Indicators Type Socket for Windows Power Control Optional external feeding Improves the perfomance when we intend to connect several devices simultaneously some devices require more current and the external source allows to reach those requirements. Specifications 5V 1A 35 x 135 mm power pointer