LONG OUTPUT DISTANCE: This 10mW visual fault locator emits a strong red light visible up to 10 kilometers, with high-efficiency power circuits ensuring stable performance. METAL MATTE PAINT DESIGN: Features a stainless steel tip and aluminum body for durability against impact and dust. Grounded case design helps prevent ESD damage. WIDELY USED: Equipped with a 2.5mm universal connector compatible with ST, SC, FC, and LC connectors on both round and square fiber optic cables. Suitable for testing single-mode and multi-mode fibers. Material: Aluminum, pen-type Output Optical Power: Over 10mW Output Distance: 10km Wavelength: 650nm 20nm Operating Temperature: 0C to 60C Storage Temperature: -20C to 70C Operating Mode: CW and Pulse Applicable Interface: ST/SC/FC/LC (LC requires additional adapter) Power Supply: 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 color variations between the image and the actual item. Measurement allows an error of +/- 1-3cm.