1) 32-bit, 33MHz PCI interface compliant with PCI local bus specification revision 2.2 2) 4 downstream USB ports 3) Each USB port provides full USB bandwidth to the attached device 4) Full compliant with universal serial bus specification version 2.0 5) OpenHCI open host controller interface specification for USB release 1.0a compliance 6) Fully compatible with Microsoft Windows 98/ 95 / Windows NT - standard open HCI drivers 7) Fully compatible with Mac OS 8.5 and OS 8.6 8) Integrated dual-speed USB transceivers 9) 3V and 5V switchable PCI signaling 10) IC chip: Lucent USS-344 11) Low power mode and wake up compatible with PCI power management interface specification version 1.1 12) Supports up to 127 devices per port 13) Supports peripheral hot swap and wake-up 14) Supports legacy keyboard and mouse 15) Full 12Mbps bandwidth per port 16) Seamless integration with 3V and 5V PCI-based computer products 17) Supports all USB compliant devices and hubs 18) Simultaneous operation of multiple high-performance devices