Welcome to the store! 1. LIGHTWEIGHT AND PORTABLE: Visual fault locator adopts ergonomic design, lightweight and comfortable, easy to carry around. 2. POWER SUPPLY: Visual fault locator supports a variety of power supply modes for alkaline batteries, charging banks, computers, adapters, and lithium batteries. 3. WITH LIGHT: Fiber optic cable visual fault locator supports lighting function, convenient for field, equipment room, night, and other dark environment cable inspection. 4. OPTICAL FIBER AND INTERFACE: VFL red light pen is powered by a constant current source and connected to the optical interface. After connecting to the optical interface, the VFL red light pen enters the multi-mode and single-mode optical fiber, supporting FC, SC, ST interfaces. 5. 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. 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) 1 x Visual Fault Locator 1 x Ceramic Tube 1 x User Manual Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!