High-performance fiber optic tester with a dynamic range of 500m to 120km and pulse widths from 3ns to 10µs. It features Auto, Manual, and Real-time modes with test times of 5s to 180s and 30,000 sampling points for accurate measurements. Includes a VFL with 650nm wavelength, a stable OLS with >-12dBm output, and an OPM calibrated for multiple wavelengths. It has a 4-inch color touch screen, 120M storage, and a 4000mAh battery. The device is compact, lightweight, and operates in various environments.