1、[Fiber Fault Detection] Driven by a constant current source, this visual fault locator efficiently detects fiber faults by entering multimode and single mode fibers when connected to the optical interface. 2、[Multiple Power Supply Options] Support various power supply methods such as alkaline batteries, power banks, computers, adapters, and can batteries. 3、[Illumination Function] This fiber visual fault tester facilitates line inspection and construction in dark environments such as outdoor settings, data centers, and night time operations. 4、[Ergonomic Design] This visual fault locator is lightweight, ergonomic designed, comfortable to use, user friendly, ensuring ease of handling. 5、[Wide Usage] This is an indispensable tool in fiber engineering construction, fiber network maintenance, and optical component production and research.