Feature: 1. STABLE AND POWERFUL: Visual fault locator has a longer penetration distance, stable performance and long service life 2. SIMPLE TO REPLACE: VFL visual fault locator support FC, SC, and ST interfaces and come with a detachable metal pen tip for easy replacement of ceramic cores 3. WORKING PRINCIPLE: Fiber optic visual fault locator is driven by a constant current source, connected to the optical interface, and then enter the multi mode and single mode optical fiber to realize the fiber fault detection function 4. APPLICABLE SCENARIO: Network cable tester is an indispensable tool in optical fiber engineering construction, optical network maintenance, optical device production and research 5. WITH BAG: Optical continuity network cable tester equipped with a storage bag for easy storage, portability and access, and also prevent damage and loss Specification: Item Type: Visual Fault Locator Output Distance: 1KM Wavelength: 650NM±10NM Optical Fiber Connector: Universal 2.5MM connector Operating Temperature: +10℃ to +45℃ Blinking Frequency: 1HZ Operating Humidity: 30% to 90% Battery Type: 2 x AAA battery(not included). Package List: 1 x Visual Fault Locator1 x Storage Bag