If you want to convert your graphics card's DVI output into a standard VGA type connection for use with a VGA or SVGA monitor, this little adaptor will do it for you.It's great if (say) you want to use two VGA monitors, but your graphics card only has one VGA output and one DVI. By using this adaptor with the DVI output, you can connect to two VGA monitors. This is a great way to use any old monitors you have lying around for a second output!(Please note that DVI connection must be DVI-I (analogue/digital) or DVI-A (analogue only). It will not work with DVI-D (digital only) connections).