Feature:1. MAIN FUNCTIONS: The pen visual fault detector is specially designed for the design and maintenance of optical cables and lines, used to locate cables and defects on the cable viewing, search for fiber breaks and use of optical cable defective equipment2. PORTABLE AND CONVENIENT: Visual fault locator is small, light weight, energy saving, easy to carry and stable output power, which is a good tool for optical fiber testing3. STABLE OUTPUT: Fiber optic visual fault locator adopt non contact connection, non destructive fiber and transmitter end face, output power is not affected by voltage fluctuations4. SMALL FLASHLIGHT FUNCTION: The fiber optic source tester is equipped with a small LED bright flashlight, which is convenient for construction in dark conditions5. UNIVERSAL ADAPTER: Fiber visual fault locator has a 2.5mm universal interface to meet various connector requirements. You can replace the adapter head and ceramic core by yourselfSpecification:Item Type: Visual Fault LocatorModel: VFL 22M G 30Battery: 2 x AAA batteries(not include)Output Wavelength: 650nm10nmFiber Optic Adapter: Universal connectorOperating Temperature: -20-and60Output Distance: 30KM.Package List:1 x Visual Fault Locator