Bring 1 Gb optical connectivity to a PCIe x4 host with a single open SFP port designed for multi-mode fiber deployments. This AddOn Networks adapter is built for environments that need a clean, direct path to fiber without the cost or complexity of larger interface cards. The 550 m reach on MMF makes it well suited for short-to-midrange uplinks between servers, aggregation switches, and distribution points inside the same facility. A single SFP port keeps the design focused and efficient, while the PCIe x4 host interface provides the bandwidth path needed for stable network attachment in space-conscious systems. For infrastructure teams, this is the kind of adapter that earns its place by solving a specific problem well: adding optical connectivity where copper is no longer the right answer. It is a practical choice for server rooms, edge systems, and network appliances that need dependable 1 Gb fiber access with minimal footprint and clear deployment intent.