A fiber optic multimeter is a versatile device used in fiber optic technology to perform multiple measurement functions in a single tool. It combines the capabilities of a power meter, light source, and visual fault locator (VFL) into a single unit. The multimeter allows technicians to measure optical power levels, check signal continuity, identify fiber faults, and locate breaks or bends in the fiber. It is an essential tool for fiber optic network testing, installation, and troubleshooting, providing comprehensive and efficient measurement capabilities in a single device.