ECHTPower(TM) USB 3.0 4 in 1 Card Reader & USB 3.0-Port Hub Multiport 3 Slots COMBO for Macbook Notebook PC Super-Speed USB 3.0 interface, backward compatible with USB 2.0/USB 1.1 Built-in DC connector for huge power consumption when plug in power adapter LED indicator display power and operation status Fashionable and solid Aluminium case & Luxurious mirror surface.LED indicator display power and operation status Easy to take, use and install, no additional software installation required