[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. Breaks or faults in the fiber will refract the light, producing a visible glow at the affected area.[Excellent Functions] This fiber optic tester is suitable for field use with features including constant output power, multi-interface compatibility, low battery warning, extended battery life, and long-distance detection. Features a super bright output and operates using a standard AA battery.[Widely Used] 2.5mm universal connector designed to fit ST, SC, and LC interfaces, compatible with both round and square-shaped fiber optic cables.[Long Output Distance] The 30mW visual fault locator provides a strong 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).Battery Requirements: Two 1.5V AA batteries (not included) Color: Green + Black Material: Aluminum Alloy Package Contents: 1 x Visual Fault Locator Note: Lighting and display settings may cause slight variations in color between the product image and the actual item. Measurement tolerance is +/- 1-3 cm.