Use these adaptors to extend your VGA signal with Patch leads Extend your VGA devices by up to 100ft 30m via these adapters use either CAT5 CAT5E or CAT6 LAN cable.Useful Tips: Make sure that the your connection works over regular VGA cable first. The adaptor CAN NOT be used via a switch router or hub. You CAN use VGA switches splitters and amplifiers. DO NOT use crossover network cable. Use either 568A or 568B wiring on both ends. If connecting to a TV with VGA PC Input and there is the message Unsupported PC Signal check your manual for maximum or fixed resolution of your TV PC input. In most cases it is 1024x768. The other way to test the limits is to lower your PC video card resolution to 800x600 then gradually increase it. Some TVs and monitors require fixed resolution of the video card in order to display picture.