Feature: 1. NON TOUCH, HIGH EFFICIENCY: This portable optical fiber tester uses a non touch connection, does not damage the fiber and transmitter end face, and the output power is not affected by voltage fluctuations, improving the test efficiency 2. OUTPUT WAVELENGTH: The VFL test distance is 15km and the output wavelength is 650nm±10nm. This fiber optic test pen can provide stable output power and high energy efficiency 3. PORTABLE AND NON SLIP: The visual fault locator pen has a portable design with a non slip handle for easy and comfortable grip. Small and lightweight, easy to use anytime and anywhere 4. STABLE AND TRUSTED: The rechargeable VFL is equipped with a standard 2.5mm universal fiber connector for various fiber types, has the characteristics of strong light source, fast switching control, high performance and high efficiency 5. APPLICABLE SCENARIO: The pen visual fault detector is designed for maintaining optical cables and circuits, locating defects on optical fibers and cables, and searching for broken optical fibers and defective equipment Specification: Item Type: Visual Fault Locator Material: Aluminum alloy VFL Test Distance: 15km Output Wavelength: 650nm ±10nm Fiber Adapter: Universal connector Operating Temperature: 0~+60℃ Storage Temperature: -20~+70℃ Battery Type: 1 x 3.7V rechargeable li ion battery, Capacity: 500mah. Package List: 1 x Visual Fault Locator 1 x Lanyard 1 x USB C Charging Cable 1 x User Manual