Monoprice 4-Ports USB 2.0 HUB with Switch Combo Plug and play - no drivers required Interface: USB 1.1 / 2.0 Transfer speed: 480MBps Max (USB 2.0 high speed) Dimensions: 100x44x25 mm Operating systems supported: Windows 98, ME, 2000, XP, Vista - Mac OS 8.7 - 9.x, OS X