Wide range of applications: Fibre optic cable tester is suitable for integrated cabling systems, fibre optic engineering, CATV engineering, optical network maintenance, optical communications, optical measurement and drive engineering, optical device production and research Light. Wide range of applications: Fibre optic cable tester is suitable for integrated cabling systems, fibre optic engineering, CATV engineering, optical network maintenance, optical communications, optical measurement and drive engineering, optical device production and research Light. Stable Output The fiber optic pen has stable output, the output distance is 50 km, which is a good tool for testing fiberglass. and Portable: The fiber optic pen is lightweight, energy-saving and easy to carry for outdoor work. Aluminum Alloy Housing The body of this fiber red light pen is made of. Accurate Identification : This pen type fiber visual fault locator is specially designed to maintain fiber optic cables and wiring, to effectively locate defects on cables. Non Connection: The meter will not damage the fiber and the end face of the transmitter, and the output power is not affected. Equip your fiber optic toolkit with a reliable visual fault locator. Find options with long-range detection, universal connectivity, and portable designs. Check each product page for other buying options.