Easy identification of fiber breakpoints, poor connections, bending or cracking. Excellent for finding the right fiber to splice or quickly finding a break. This 30mW Visual Fault Locator emits 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 its multiple functions such as constant output power, multi-interface adaptation, low battery warning, long battery life, and long-distance detection. Uses convenient AA battery. Universal 2.5mm connector is compatible with ST, SC, FC and LC interfaces for both circle and square shape fiber optic cables. The 30mW visual fault locator has a strong output power and can output a strong red indicating light up to 20-30 kilometers. The high-efficiency power supply circuit ensures a stable power supply. Designed with stainless steel head and aluminium body to prevent crash and dust. The case ground design prevents ESD damage efficiently. Condition: New. Origin: China. Batteries: Two 1.5V batteries (not included) Type: A Colour: Green + Black Material: Aluminum alloy Package Contents: 1 x fiber identifier Only the above package content, other products are not included.