ABCsell Powered USB 3.0 4-Port SuperSpeed Compact Hub Adapter For PC Laptop Mac Compliant with USB version:1.1/2.0/3.0 Supports High-Speed(5G Mbps),Full-speed(480Mbps) and Low-speed(12Mbps) USB device profiles Output 4 standard USB 3.0 Port(AF) Blue LED Power indicator System requirements: windows XP, vista, win7, Mac OS (10.X or above).