The Optix Fiber Identifier is suitable for 250um, 900um, 2mm, and 3mm fiber using the universal adaptor with no need to replace the block clamp. It also has a built-in 10mW VFL function. The OFI Detects attenuation associated with macrobending measurement, the attenuation associated with the bending of optical fiber that causes light to "leak out" of the fiber. The light leakage is detected by the fiber identifier in direction and intensity. The fiber cable is not damaged and signal communication is not interrupted.