FREEGENE USB 3.0 3-Port Aluminum Hub with SD/TF Card Reader Combo for iMac, MacBook Air, MacBook Pro, MacBook, Mac Mini, PCs and Laptops Type: USB/Reader Standards: USB 3.0/2.0/1.1 Max Devices Supported: 127 Ports: 3 x USB 3.0 Transfer Rate: Up to 5 Gbps Supported Cards: SD, Micro SD Power Input: 5V DC Operating System Supported: • Windows XP / Vista / 7 / 8/10, Mac OS 9.1 and above • Mac OS X Lion 10.7.4 users should upgrade to Mountain Lion 10.8.2 or later to avoid unstable connections.