This LC-FC Hybrid Adapter allows you to patch together LC and FC connectors or LC and FC fiber patch cables quickly. The LC-FC adapters feature zirconia ceramic alignment sleeves which provide precision mating and low insertion loss and return loss for Singlemode or multimode. Adapt Fiber Test Equipment: Designed to connect standard fiber test tools that are not LC-compatible, including Visual Fault Locators, power meters, and OTDRs, this optical adapter provides a reliable way to link FC connectors to LC ports. Fiber optic's advantages over copper cabling are well known immunity to EMI and RFI, low attenuation over long distances, high bandwidth capacity, smaller size and lower weight. Fiber optic connectors are the critical interface that couples light from one fiber to another.