WatchGuard 8 Port 1Gb SFP Fiber Module for Firebox M Series - For Optical Network, Data NetworkingOptical FiberGigabit Ethernet - 1000Base-X8 x Expansion Slots' Supports optical fiber cable for durable performance, minimal signal loss, and fast data transfers to greater distances Up to 10x faster than standard Ethernet connection and provides high-performance With 1000Base-X technology, get up to 1000Mbps data transfer rate over supported network cable