[High Efficiency] Easily identify fiber breakpoints, poor connections, bending, or cracking. Ideal for locating the correct fiber for splicing or quickly identifying faults. This 30mW visual fault locator emits a bright 650nm red light for efficient fiber tracing, routing, and continuity checking. Faults in the fiber will refract the light, producing a visible glow at the point of damage.[Excellent Functions] This fiber optic tester is ideal for field use, offering multiple features including constant output power, multi-interface compatibility, low battery warning, extended battery life, and long-distance detection capability. Features super-bright output and operates using standard AA batteries for convenience.[Widely Used] 2.5mm universal connector designed to be compatible with ST, SC, FC, and LC interfaces, supporting both round and square ferrules across various fiber optic cables.[Long Output Distance] The 30mW visual fault locator delivers strong output power, emitting a highly visible red light effective up to 2030 kilometers. An efficient power circuit ensures stable performance during extended use.[Crash-Proof and Dust-Proof Pen Design] Constructed with a stainless steel tip and aluminum body for enhanced durability against impacts and dust. Grounded case design helps protect against electrostatic discharge (ESD) damage.Batteries: Two 1.5V AA batteries (not included) Type: A Color: Green + Black Material: Aluminum Alloy Package Contents: 1 x Fiber Visual Fault Locator Note: Lighting and monitor settings may cause slight color variations between the image and the actual product. Measurement tolerances may vary by 13 cm.