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 Ultra slim structure design Blue LED Power indicator Standard 0.2M line length Output 4 standard USB 3.0 Port(AF) Bus-power limit current protection: 900mA System requirements: windows XP, vista, win7, Mac OS (10.X or above). Size: 75*37*10mm Color:Black.White Package Content: 1 X Powered USB 3.0 4-Port SuperSpeed Compact Hub Adapter For PC Laptop Mac(without retail package)