Feature: 1. MAIN FUNCTION: Fiber visual fault locator, specially used to locate the defects on optical fiber cables and visually search for fiber breakage and usage. 2. LESS INTERFERENCE: Non contact connection, lossless optical fiber and transmitter end surface, output power is not affected by voltage fluctuation. 3. WORKING RANGE: The output wavelength range of the test pen is 650±10nm, the output distance is 50KM, and the application range is wide. 4. PORTABLE DESIGN: The optical fiber tester is compact, easy to carry, and ensures stable output power, is a practical tool for optical fiber testing. 5. ALUMINUM ALLOY: The shell of the visual fault locator is made of aluminum alloy, light in weight, wear and corrosion resistant, sturdy and durable. Specification: Item Type: Optical Fiber Tester Pen Model: AUA H50 Material: Aluminum Alloy Output Power: >50MW Output Distance: 50KM Output Wavelength: 650±10nm Operating Temperature: 0-60℃ Storage Temperature: - 20-70℃ Battery Type: 2 x 1.5V AA battery (not included battery). Package List: 1 x Tester Pen1 x Pen Bag1 x Hanging Rope1 x Ceramic Core1 x User Manual1 x FC to LC Adapter