CG0048W Four USB interfaces USB 3.0 design Compatible with USB 2.0 & USB 1.1 Transmit Speed: 5G MBPS, 480MBPS, 12MBPS Plug and play With LED indicator Cable Length: 1 m Over-current detection function High voltage protection Required System: Windows 2000, XP, Vista, Windows 7, MAC OS 9.0X, 10.0X, Linux