The DUB-C2 is a Hi-Speed USB (Universal Serial Bus) 2.0 2-port Card Bus adapter that upgrades notebook computers to the new & faster USB (Universal Serial Bus) standard. This card is designed to work with mice, keyboards, external CD-R/RWs, external hard drives, PC cameras, & all other USB (Universal Serial Bus) enabled devices. It is 40 times faster than previous USB (Universal Serial Bus) adapters & 20% faster than Firewire (IEEE-1394). Each of the two USB (Universal Serial Bus) 2.0 ports transfers data at 480 Mbps, making it ideal for external storage, backup, networking & digital video. The DUB-C2 is compatible with USB (Universal Serial Bus) 2.0 standards & is backward compatible with USB (Universal Serial Bus) 1.0 & USB (Universal Serial Bus) 1.1 products. This gives you the ability to connect all of your USB (Universal Serial Bus) 1.x devices to the DUB-C2 USB (Universal Serial Bus) 2.0 adapter & they will work. Each port detects whether the connected device is USB (Universal Serial Bus) 1.x or USB (Universal Serial Bus) 2.0 & automatically runs the device at the correct speed. The DUB-C2 supports Plug-&-Play installation which makes the DUB-C2 easy to install.