This listing is for both the "S" and the "R" Module pair.
Please see our other listings if you just need a single "R" or "S" module.The Gefen EXT-DVI-FM2500 Dual Link DVI FO Module Extender is a reliable adapter designed to extend dual-link DVI signals over fiber optic cable. With the model number DL DVI 2FO, this product is perfect for boosting and extending connectivity in home networking and computer setups. Gefen is known for producing high-quality networking products, making this adapter a trusted choice for those in need of a solution for expanding their display or workstation.