What is a USB graphics card?
USB graphics card — is a relatively small device that connects to a USB 2.0 port. You can connect to it an additional monitor, eliminating the need for installing additional expansion cards in a PC base unit. On market is also present USB-monitors (eg, Samsung), which do not need a graphics card at all, they connect directly to USB-port.
And recently became available and quite exotic device - a wireless USB graphics card. Data transmission in this case will be implemented through a wireless interface USB, and the radius of the built-in adapter makes up to three meters. Users will be able to organize a wireless connection to a personal computer to six monitors at once, but in this case, gamers are unlikely to be satisfied with the picture quality, but for office work, it will be quite enough.
You can buy a wireless keyboard and mouse, to completely remove the wiring and get all benefits of mobility.