Feature: 1. VARIOUS FUNCTIONS: Visual fault locator uses a highly integrated chip that integrates power management, signal modulation, and switch control 2. CORROSION RESISTANT MATERIAL: VFL fiber tester through fiber coupling, optical power packaging, excellent aluminum alloy material has strong performance, corrosion resistance, feel comfortable 3. COMPREHENSIVE PROTECTION: Fiber optic cable tester adopts nano technology, multiple electrostatic protection; With light mouth protection device, pen design, easy to use and carry 4. COMPACT AND PORTABLE: Fiber optic visual fault locator has compact size, easy to put in the pocket, does not take up space, convenient for travel, not only appearance, function also give you a new experience 5. WEAR RESISTANT AND NON SLIP: Fiber optic cable tester with strong red light, metal body is wear resistant and fall resistant; Standard 2.5mm interface, non slip handle, feel comfortable 6. EXCELLENT PERFORMANCE: Visual fault locator can easily penetrate long distance optical fibers; Excellent laser head has strong stability and good penetration effect Specification: Item Type: Visual Fault Locator Material: Aluminum alloy Battery: 2 x 1.5V AA battery(without battery) Use: Optical fiber communication detection Basic Parameters: Working Wavelength: 630nm~670nm. Package List: 1 x Instrument1 x User Manual1 x Portable Bag1 x Lanyard