Startech USB TO VGA EXTERNAL VIDEO CARD MULTI MONITOR ADAPTER USB2VGAE3 Other Accessories
Price : £43.04
startech USB to DVI External Video Card Multi Monitor Adapter - 1920x1200 - external video adapter - 32 MB - black (Manf Part Code: USB2DVIE3)
Price : £45.77
Startech USB VGA EXTERNAL DUAL OR MULTI MONITOR VIDEO ADAPTER UK USB2VGAE2 Cables Monitor Cables
Price : £38.77
Startech USB 3 TO HDMI DVI EXTERNAL VIDE CARD MULTI MONITOR ADAPTER UK USB32HDE Other Accessories
Price : £63.49
The USB2HDMI USB HDMI External Video Adapter (Dual or Multi Monitor with Audio) turns an available USB 2.0 port into an HDMI output with high resolution video support (up to 1920x1080) and audio. The USB HDMI adapter can be used to mirror your primary desktop showing the same image on each display or to extend your desktop to double your workspace and increase your productivity. This external graphics card is a cost-saving multi-monitor or dual display solution for either laptop or desktop applications offering the ability to connect an additional HDMI (or DVI) display to your computer setup without the hassle of opening the computer case to install a new video card.
Price : £63.96

The ClimaxDigital CUH195 USB 2.0 Graphic Adapter allows you to connect an extra monitor to your desktop PC or laptop's USB port. The connected monitor can be configured to either clone your primary screen, or extend the Windows desktop allowing visibility of more applications at the same time.
The USB 2.0 Graphic Adapter driver used to control the extra screen uses very little computer resource and offers a vast array of screen resolutions and color depths. This ensures that there is little difference in performance between a directly connected screen and a screen connected through the USB 2.0 Graphic Adapter
The USB 2.0 Graphic Adapter supports up to six simultaneous displays, including widescreen displays, extending your desktop and your horizons. It operates at a high resolution of 1920x1200 / 2048x1152.
***System Requirements***
1)CPU with 1.2GHz or higher processor
2)256MB RAM
3)one free USB 2.0 port
4)30MB free hard drive space
5)super VGA (800X600) or higher resolution monitor
6)Win2K/XP/Vista 32/64bit, Windows 7, Mac OS X
7))Does NOT support XP 64bit and Windows Server
***What's in the box***
Package Content
* 1 x USB to DVI Adapter
* 1 x Quick Start Guide
* 1 x CD-ROM with User Guide and Installation Software
* 1 x USB 2.0 Cable
* 1 x DVI to VGA Adapter
* 1 x DVI to HDMI Adapter
Price : £59.99

Featuring DisplayLink's high-end DL-195 USB 2.0 graphics chipset, the Plugable UGA-2K-A enables multiple monitors with any laptop or desktop (one adapter required per monitor, up to 6 on Windows). Most people use it to gain a 3rd or 4th monitor for their laptop. You get the full benefits of USB, including plug and play connectivity, thin and flexible cabling, and ability to connect via USB 2.0 hubs and repeaters. Multitask with a dedicated monitor for each document or application. PerformanceUSB graphics adapters work by rendering 2D/3D with your computer's CPU and GPU, and then compressing and transmitting the pixels that change over USB. Dual core or 2Ghz or better CPU recommended. Recommended for web and applications, not 3D gaming or motion video playback. Connectivity The adapter package includes the main USB 2.0 to DVI-I adapter, USB 2.0 cable, and DVI-I to VGA/D-Sub and DVI-I to HDMI adapters. HDMI connections are graphics only, no audio. Analog VGA connections up to 1920x1200 and digital DVI/VGA connections up to 2048x1152. No power plug is needed - power is provided by USB and the adapter has an LED indicator light. DriversWindows 7/Vista/XP drivers installed automatically via Windows Update. 32 and 64 bit supported for both Vista and Win7. Microsoft's low-end Vista Home Basic and Win7 Starter Edition disable multiple monitors and are not supported. GPU is used for 2D/3D rendering on Windows, requiring Intel, nVidia, or ATI primary WDDM driver. Not recommended for use with Mac (beta drivers only). Open source available for Linux and other platforms. Linux requires xorg.conf editing - for advanced users only.
Price : £49.90
Startech PROFESSIONAL USB VGA EXTERNAL MULTI MONITOR VIDEO ADAPTER UK USB2VGAPRO Other Accessories
Price : £74.59
Startech PROFESSIONAL USB DVI MULTI MONITOR VIDEO ADAPTER USB2DVIPRO Other Accessories
Price : £82.54