The D-Link DUB-E100 Hi-Speed USB 2.0 Fast Ethernet Adapter plugs into an available Universal Serial Bus (USB) port on your desktop or laptop with a built-in USB 2.0 cable. It also provides a standard RJ-45 connector for connecting to an Ethernet 10Mbps or Fast Ethernet 100Mbps based LAN via a network hub or switch. The adapter features an easy out-of-the-box installation approach eliminating the need to use an ISA, PCI, or PC Card slot to add LAN connectivity to your desktop or laptop. Power for the DUB-E100 is provided directly by the USB bus, eliminating the need for an external power adapter. It also supports USB's energy saving suspend and resume functions to minimize power consumption, which is especially useful for laptop/laptop users. The DUB-E100 represents the simplest way to connect your computer to an Ethernet based network.