[High Efficiency] Easy identification of fiber breakpoints, poor connections, bending, or cracking. Ideal for locating the correct fiber for splicing or quickly identifying faults. The 30mW visual fault locator emits a 650nm bright red light for efficient fiber tracing, routing, and continuity checking. Faults in the fiber will refract the light, producing a visible glow at the fault location.[Excellent Functions] This fiber optic tester is ideal for field use, featuring constant output power, multi-interface compatibility, low battery warning, extended battery life, and long-distance detection capability. Equipped with a super-bright output and powered by 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 ferrule shapes across various fiber optic cables.[Long Output Distance] The 30mW visual fault locator delivers strong output power, emitting a highly visible red laser light effective up to 20-30 kilometers. The high-efficiency power circuit ensures stable operation.[Crash-Proof and Dust-Proof Design] Features a stainless steel tip and aluminum body for enhanced durability against impact and dust. The grounded case design provides effective protection against electrostatic discharge (ESD).Batteries: Two 1.5V AA batteries (not included) Type: A Color: Green + Black Material: Aluminum alloy Package Contents: 1 x Fiber identifier Note: Lighting and display settings may cause slight color variations between the image and the actual item. Measurement tolerance is +/- 1-3 cm.