【High Efficiency】Easy identification of fiber breakpoints, poor connecttions, bending or cracking. Excellent for finding the right fiber to splice or quickly finding a break. Our 10Km Fiber Fault Detector can be used for fiber tracing, fiber routing and continuity checking efficiently. 【Excellent Functions】 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. Using convenient AA battery(not included). 【Widely USed】2.5mm Universal Connector - the connector of the detector is compatibly designed for ST, SC, FC interferes both in circle and square shape of different fiber optic cables. 【Stable Function】Using high-performance aluminum alloy and advanced APC circuit board, anti-oxidation, corrosion-resistant, high-efficiency power supply circuit ensures stable power supply. 【Crash-proof Design for Head】It Is designed with stainless steel head and aluminium body to prevent crash, and the case ground design prevents ESD damage efficiently. Duogalia 4PC Fiber Fault Detector 10Km Fiber Optic Tester for Network Cable Test, 2.5mm Universal Connector Suitable for FC SC ST