Feature:1. Fiber Optic Test Tool: Specially designed for optical cables and lines maintenance, this VFL pen could locate defects on cables, visually search for fiber breaks.2. Non Contact: Adopt non contact connection way, there is no loss for optical fiber and transmitter end face, and the output power is not affected by voltage fluctuation.3. Wide Application: With 2.5mm universal interface, ensures a wide range of applications, the output distance is up to 60km, highly practical.4. Stable Output: This fiber optic source tester is energy saving, could output power stably, is a good tool for optical fiber testing.5. Easy Carrying: The fiber optic tester is compact size, light weight, comes with pen bag and lanyard, more convenient for carrying around.Specification:Item Type: Visual Fault LocatorMaterial: AluminumUniversal Interface: 2.5mm (FC SC ST)Output Wavelength: 650nm 10nmOutput Optical Power: andgt 60MWOptical Fiber Adapter: Universal connectorOutput Distance: 60KMOperating Temperature: 0 to and60Storage temperature: -20 to and70Battery Type: 2 x 1.5V AA battery (shipped without battery).Package List:1 xVisual Fault Locator1 x Pen Bag1 x Lanyard1 x ManualNote:Do not aim at eyes.