HP 4-Port USB 2.0 Hub + hp The HP 4-port USB 2.0 Hub expands the number of hubs on your computer. It allows you to connect up to 4 USB devices simultaneously with true plug and play connectivity. You can add or remove devices such as mice, keyboards and digital drives at any time - no need to power down or restart your computer. The hub is self-powered and provides sufficient power for cascading devices. By connecting devices using additional hubs, you can connect up to 127 USB devices to a single port on this hub. The HP 4-Port USB hub is designed to be compatible across a wide range of HP products including desktops, notebooks, iPAQ pocket PCs, printers and digital cameras. System Requirements Available Hi-Speed USB 2.0 port. Windows® 98 SE, Me, 2000, and XP Mac OS® X v10.3 or higher Key Features: Quad TT (Transaction Translation) support. – dedicated USB 2.0 performance (480Mbps) across each of its 4 ports. Comes with an internal plug-point AC adapter and a USB cable. Low-end port replicator. Connection of USB devices like mouse, keyboard, ipaq, digital camera etc. Supports “hot-swapping” of USB devices. Works with all USB 2.0 and 1.1 devices. Protects your equipment with Power Surge protection. Lifetime Warranty. HP Part Number: DG954A