The st1214t 4 port vga video extender over cat 5 allows a single vga source to be broadcast to up to four remote displays at distances of up to 500 feet 150 meters designed for use with the st121 vga video over cat 5 extension series of devices the st1214t is one of many options designed to help you create a custom vga distribution and extension solution for many applications including digital signage and video conferencing consisting of the transmitter unit only this product requires a