Essential Tool for Fiber Optic Professionals: The Optic Fiber Tester Light Source KLS-35 is specifically designed for FTTH applications. Innovative Self Calibration Feature: With its advanced self-calibration functionality, this handheld fiber optic tool ensures accurate and reliable testing of fiber optic cables every time. Lightweight and Portable Design: The KLS-35's compact and lightweight design allows for easy handling and transport. Versatile Compatibility: This fiber optic tester is compatible with a wide range of fiber optic cables, providing users with the flexibility to tackle various testing scenarios effectively. Durability for Fieldwork: Built to withstand challenging conditions, the Optic Fiber Tester Light Source KLS-35 ensures long-lasting performance.