Features:

• Easy connections. Add new peripherals instantly without shutting down your computer.
• Full power. This powered hub delivers full 500 mA to each attached USB device.
• High speed. Each port supports speeds up to 480 Mbps.
• Expandability. Attach more hubs to connect up to 127 USB devices.

System requirements:

• Compatibility: Mac, PC
• Model: 4-Port Serial Adapter
• Connector Type: 9 pin D-Sub (DB-9)
• Interface: RS-232
• Quantity: 4 Ports
• Type: Serial
• Connectivity Technology: Wired
• Data Link Protocol: RS-232
• Data Transfer Rate: 230 Kbps
• Form Factor: External
• Keyspan also makes both PCI and CardBus USB 2.0 adapter cards that support the Mac.

The Keyspan USB 2.0 Hub provides a simple and reliable way to connect 4 USB devices to your PC. It supports both USB 1.1 and USB 2.0 devices, and may be connected to a USB 1.1 or USB 2.0 port on your PC.

When connected to a USB 2.0 port, it supports data rates of 480 Mbps. 40 times faster than previous versions of USB.