Feature: 1. Product Usage: The pen type visual fault detector is specifically designed for maintaining optical cables and circuits, locating defects on optical fibers and cables, and searching for broken optical fibers and defective equipment. 2. Non Contact: This portable fiber tester adopts non contact connection, which does not damage the end face of the fiber optic and transmitter, the output power is not affected by voltage fluctuations, improving testing efficiency. 3. Output Parameter: The output optical power is >80mW, with an output wavelength of 650nm±10nm. This fiber optic test pen can provide stable output power, which is efficient and energy saving. 4. High Performance: Equipped with standard 2.5mm universal fiber connector, suitable for various optictal fiber types. Has strong light source, quick control of on off, stable performance, and high efficiency. 5. Convenient Use: This fiber optic test pen has a portable design, with non slip handle that provides convenient and comfortable grip. Compact and lightweight, convenient for use anytime, anywhere. Specification: Item Type: Fiber Optic Test Pen Model: HT-80 Output Optical Power: >80mW Output Wavelength: 650nm±10nm Fiber Adapter: 2.5mm Universal Connector Working Temperature: 0-60℃ Storage Temperature: -20-70℃ Battery Type: 2 x AA Alkaline Battery (Not Included). Package List: 1 x Fiber Optic Test Pen 1 x Ceramic Core 1 x Storage Bag 1 x Lanyard 1 x User Manual