[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 suitable 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, and LC interfaces, supporting both round and square fiber optic cable types. [Long Output Distance] The 30mW visual fault locator delivers a powerful red light output capable of reaching distances up to 20-30 kilometers. High-efficiency power circuitry ensures stable performance. [Crash-Proof and Dust-Proof Design] Features a stainless steel tip and aluminum body for durability against impact and dust. The 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 Identifier Note: Lighting and display settings may cause slight variations in the color shown in images compared to the actual product. Measurement tolerances may vary by +/- 1-3 cm.