Vis-Link 10mW, 10km fiber visual fault locator (VFL) is a handheld tool that uses a 650nm red laser to find faults in single-mode or multimode fiber optic cables. Key datasheet specifications include a wavelength of 650nm±10nm, output power of 10mW, a maximum distance of 10km, and a 2.5mm universal connector that can be adapted for 1.25mm LC connectors. It operates in either continuous wave (CW) or pulsed modes and is powered by two AA batteries