PTZOptics 75' DB9 Extender SKU: DB9MF75 Please log in to see price or purchase this item Quantity discounts available QuantityPrice The 75 foot DB9 Extender gives you the ability to extend your RS-232 cable over a longer distance. Details The 75 foot DB9 Extender gives you the ability to extend your RS-232 cable over a longer distance. Details Back DetailsThe 75 foot DB9 Extender gives you the ability to extend your RS-232 cable over a longer distance.