Linksys by Cisco MGBLH1 Gigabit LH Mini-GBIC SFP Transceiver Gb IC sfp (mini GB IC) Gigabit interface converter, 1000Mbps single mode fiber lh transceiver. Design that delivers high availability, scalability, and for maximum flexibility and price/performance Made in Taiwan Former Linksys Business Series Supports 1,000 Mbps connectivity Warranty - 3 years The LH module uses 1310 nanometer wavelength light in multimode or single-mode fiber optic cables, and can achieve distances up to 500 meters or 40 kilometers, depending on the fiber used: 1) 62.5/125um MMF @ 200MHz/km, up to 500m