JW3105 visible laser light source with 650nm laser as the light-emitting devices, the output power of up to 1mW, for single-mode or multimode fiber measurements. Output port built-in metal ferrule, optical fiber direct output, high power into the fiber. JW3105 is that you need to test various types of fiber jumpers, ribbon, bundle pigtail, and the maintenance of the construction site, or the ideal tool for fiber optic lines.