LONG OUTPUT DISTANCE: This 10mW visual fault locator emits a strong red light with an output distance of up to 10 km. High-efficiency power circuits ensure stable performance. METAL DESIGN: Features a stainless steel tip and aluminum body for durability, offering protection against impact and dust. Grounded case design helps prevent ESD damage. WIDELY COMPATIBLE: The 2.5mm universal connector works with ST, SC, and LC interfaces, compatible with both circular and square-shaped fiber optic cables. Suitable for testing single-mode and multi-mode fibers. Shell Material: Aluminum Type: Pen-style Output Optical Power: Over 10mW Output Distance: 10 km Wavelength: 650nm ±20nm Operating Temperature: 0°C to 60°C Storage Temperature: -20°C to 70°C Operation Modes: Continuous wave (CW) and pulse mode available Compatible Interfaces: ST, SC, LC (LC requires additional adapter) Power Source: 2 AA batteries (included) Color: Black + Orange Material: Metal Package Contents: 1 x 10mW Pen-type VFL 1 x Carrying Bag 1 x Lanyard 1 x English Manual 2 x AA Batteries Note: Lighting and monitor differences may cause slight variations in color between the image and actual item. Measurement allows an error of +/- 1-3 cm.