Features Good Performance: The visual fault locator has an output distance of 10KM, a wavelength of 650±10nm, with a longer penetration distance and stable performance. 2.5mm Connector: The fiber optic detector has a universal 2.5MM connector, supports FC, SC, ST common fiber interfaces, and has good compatibility. Working Principle: Driven by constant current source, connected to the optical interface to enter the multi mode and single mode fiber to realize fiber fault detection. Portable Design: The fiber optic tester is portable design, comfortable to hold, and has a detachable metal pen tip for easy replacement of ceramic core. Applicable Fields: This visual fault locator is suitable for fiber optic engineering construction, fiber optic network maintenance, optical device production and research, etc. Specification: Item Type: Visual Fault Locator Output Distance: 10KM Wavelength: 650NM±10NM Fiber Optic Connector: Universal 2.5MM Connector Working Temperature: 10-45℃ Flashing Frequency: 1HZ Working Humidity: 30%-90% Battery Type: 2 x AAA Battery (not included) Package List:1 x Visual Fault Locator 1 x Storage Bag Package List 1 x Visual Fault Locator 1 x Storage Bag