Features POWER SOURCE: The visual fault locator supports a variety of power supply modes for alkaline battery charging banks, computers, adapters and lithium batteries. LIGHTWEIGHT AND PORTABLE: The visual fault locator adopts ergonomic design, lightweight and comfortable, easy to carry WITH LIGHT: The optical fiber cable visual fault locator supports lighting function, convenient for field line inspection construction, equipment room, night and other dark environment. FIBER OPTICAL AND INTERFACE: The VFL red light pen is driven by a constant current source and connected to the optical interface. After connecting to the optical interface, the VFL red light pen enters the multimode and single-mode optical fiber, compatible APPLICABLE SCENARIO: The visual fault locator can realize the function of fiber optic fault detection, which is an indispensable tool in fiber optic engineering construction, fiber optic network maintenance, production and research of fiber optic devices. Specification: Item Type: Visual Fault Locator Departure distance: 5 KM Working current: ≤40mA Resistance: >10H Level output: cannot be changed Output wavelength: 650nm Interface type: approx. Universal 2.5mm/0.1 inch adapter Power supply type: 2 x AAA batteries (not included) Storage temperature: -40℃~+85℃ Working temperature: -20℃~+60℃(non-condensing) Package List: 1 x Visual Fault Locator 1 x Ceramic Tube 1 x User Manual Package List 1 x Visual Fault Locator 1 x Ceramic Tube 1 x User Manual