Ideal for plugging an Ethernet cable in to a PC or laptop without a network card Converts a USB (Universal Serial Bus) port into a network card Powerful & compact 10100 Ethernet compatible Works in both half & full duplex mode Speeds up to 12 Mbps This very compact network adaptor is connected via the computers USB (Universal Serial Bus) port. Thanks to USBs hot pluggable functionality you can connect the adaptor whilst the computer is running & register on the network.