Easy identification of fiber breakpoints, poor connecttions, bending or cracking. for finding the right fiber to splice or quickly finding a . 30mW Visual Fault Locator emit a 650nm bright red light for fiber tracing, fiber routing and continuity checking efficiently. Breaks or faults in the fiber will refract the light, creating a bright glow around the faulty area. The fiber optic tester is perfect for field tests because of multiple functions such as constant output power, multi-interface adaptation, low battery warning, long battery life, and long-distance detection. Super bright light and uses convenient AA battery. 2.5mm Universal Connector - the connector of the detector is compatibly designed for ST, , , LC interferes both in circle and square shape of different fiber optic cables. The 30mW visual fault locator has a strong output power, can output a strong red indicating light, up to 20-30 kilometers. The high-efficiency power supply circuit ensures a stable power supply. It Is Designed With High Quality Material To Prevent Crash And Dust, And The Case Ground Design Prevents ESD Damage Efficiently. color:Black Material:ABS Package Contents: 1 set x fiber light tester 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.