Easily identify fiber breaks, poor connections, bends or cracks. Great for quickly finding the right fiber for splicing or finding breakpoints. Our 30mW visual fault locator emits bright 650nm red light for efficient fiber tracing, fiber routing and continuity checks. A break or fault in the fiber will refract the light, creating a bright glow around the faulty area. The optical fiber tester has various functions such as constant output power, multi-interface adaptation, low battery warning, long battery life, long-distance detection, etc. It is very suitable for on-site testing. Super bright light with handy AA batteries. 2.5mm Universal Connector - The detectors connector is compatible with both round and square, and is designed for ST, SC, , LC fiber optic cables with different interferences. The 30mW visual fault locator has strong output power and can output a strong red indicator to 20-30 kilometers. High-efficiency power supply circuit ensures stable power supply. High quality material are designed to prevent collision and dust, and the shell grounding design effectively prevents ESD damage. color:As shown Material:plastic Package Contents: 2 x Red Light Fiber Tester 2 x Male to LC Female Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.