Features LIGHTWEIGHT AND PORTABLE: Visual fault locator adopt ergonomic design, lightweight and comfortable, easy for you to carry POWER SUPPLY: Visual fault locator support a variety of power supply modes of alkaline batteries charging banks, computers, adapters, and lithium batteries WITH LIGHT: Fiber optic cable visual fault locator support lighting function, convenient for field, equipment room, night and other dark environment line inspection construction OPTICAL FIBER 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 enter the multi mode and single mode optical fiber, support APPLICABLE SCENARIO: Visual fault locator can realize the optical fiber fault detection function, which is an indispensable tool in optical fiber engineering construction, optical fiber network maintenance, optical fiber device production and research Specification: Item Type: Visual Fault Locator Output Distance: 5KM Working Current: ≤40mA Endurance: >10H Level Output: Cannot be switched Output Wavelength: 650nm Interface Type: Approx. 2.5mm / 0.1in universal adapter Power Supply Type: 2 x AAA batteries(not included) Storage Temperature: -40℃~+85℃ Working Temperature: -20℃~+60℃(no condensation) Package List:1 x Visual Fault Locator1 x Ceramic Tube1 x User Manual Package List 1 x Visual Fault Locator 1 x Ceramic Tube 1 x User Manual